This is where our dream begins;D
Failure is an event, Never a person!
3N1! Jiayou!!^^
Date : Friday, March 5, 2010
Time : 10:31 AM
Title : Conduction
Time : 10:31 AM
Title : Conduction
CONDUCTION
LINK:http://www.youtube.com/watch?v=0cydb3TNEqk
LINK:http://www.youtube.com/watch?v=0cydb3TNEqk
Date :
Time : 10:30 AM
Title :
Time : 10:30 AM
Title :
Date :
Time : 10:30 AM
Title :
Time : 10:30 AM
Title :
Heat transfer and efficiency
can be transferred from place to place by conduction, convection and radiation. Dark matt surfaces are better at absorbing heat energy than light shiny surfaces. Heat energy can be lost from homes in many different ways and there are ways of reducing these heat losses.
There are several different types of energy, and these can be transferred from one type to another. Energy transfer diagrams show the energy transfers in a process. More efficient devices transfer the energy supplied to them into a greater proportion of useful energy than less efficient devices do.
Heat transfer by conduction and convection
Heat is thermal energy. It can be transferred from one place to another by conduction, convection and radiation. Conduction and convection involve particles, but radiation involves electromagnetic waves.
Conduction
Thermogram of a pan being heated on a stove
Heat energy can move through a substance by conduction. Metals are good conductors of heat, but non-metals and gases are usually poor conductors of heat. Poor conductors of heat are called insulators. Heat energy is conducted from the hot end of an object to the cold end.
The electrons in piece of metal can leave their atoms and move about in the metal as free electrons. The parts of the metal atoms left behind are now charged metal ions. The ions are packed closely together and they vibrate continually. The hotter the metal, the more kinetic energy these vibrations have. This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons. These move through the structure of the metal, colliding with ions as they go.
Heat transfer by conduction
Back123Next
Convection
Liquids and gases are fluids. The particles in these fluids can move from place to place. Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection.
Liquids and gases expand when they are heated. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume. This is because the gap between particles widens, while the particles themselves stay the same size.
The liquid or gas in hot areas is less dense than the liquid or gas in cold areas, so it rises into the cold areas. The denser cold liquid or gas falls into the warm areas. In this way, convection currents that transfer heat from place to place are set up.
cassandra (:
can be transferred from place to place by conduction, convection and radiation. Dark matt surfaces are better at absorbing heat energy than light shiny surfaces. Heat energy can be lost from homes in many different ways and there are ways of reducing these heat losses.
There are several different types of energy, and these can be transferred from one type to another. Energy transfer diagrams show the energy transfers in a process. More efficient devices transfer the energy supplied to them into a greater proportion of useful energy than less efficient devices do.
Heat transfer by conduction and convection
Heat is thermal energy. It can be transferred from one place to another by conduction, convection and radiation. Conduction and convection involve particles, but radiation involves electromagnetic waves.
Conduction
Thermogram of a pan being heated on a stove
Heat energy can move through a substance by conduction. Metals are good conductors of heat, but non-metals and gases are usually poor conductors of heat. Poor conductors of heat are called insulators. Heat energy is conducted from the hot end of an object to the cold end.
The electrons in piece of metal can leave their atoms and move about in the metal as free electrons. The parts of the metal atoms left behind are now charged metal ions. The ions are packed closely together and they vibrate continually. The hotter the metal, the more kinetic energy these vibrations have. This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons. These move through the structure of the metal, colliding with ions as they go.
Heat transfer by conduction
Back123Next
Convection
Liquids and gases are fluids. The particles in these fluids can move from place to place. Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection.
Liquids and gases expand when they are heated. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume. This is because the gap between particles widens, while the particles themselves stay the same size.
The liquid or gas in hot areas is less dense than the liquid or gas in cold areas, so it rises into the cold areas. The denser cold liquid or gas falls into the warm areas. In this way, convection currents that transfer heat from place to place are set up.
cassandra (:
Date :
Time : 10:28 AM
Title : Revision for CA1
Time : 10:28 AM
Title : Revision for CA1
Students of 3N1
Plse remember to revise during this weekend for your CA1 next week the topic on "Measurement" and "Transfer of Thermal Energy".
Plse also go through your assignment 1, 2 and 3.
For the answer key, please note that the edited answer to Q3, that is clockwise direction.
Mr Chio
Plse remember to revise during this weekend for your CA1 next week the topic on "Measurement" and "Transfer of Thermal Energy".
Plse also go through your assignment 1, 2 and 3.
For the answer key, please note that the edited answer to Q3, that is clockwise direction.
Mr Chio
Labels: Revision for CA1
Date :
Time : 10:21 AM
Title :
Time : 10:21 AM
Title :
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but sometimes is used to be synonymous with "oscillation."
(Aaron)
(Aaron)
Date :
Time : 10:18 AM
Title :
Time : 10:18 AM
Title :
For Convection: http://en.wikipedia.org/wiki/Convection
For Radiation: http://en.wikipedia.org/wiki/Radiation
For Conduction: http://en.wikipedia.org/wiki/Conduction_(heat)
http://physics.info/conduction/
by, Stephanie xD
For Radiation: http://en.wikipedia.org/wiki/Radiation
For Conduction: http://en.wikipedia.org/wiki/Conduction_(heat)
http://physics.info/conduction/
by, Stephanie xD
Date :
Time : 10:18 AM
Title :
Time : 10:18 AM
Title :
convection conduction and radiation
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
by: Sylvia_3n1
Date :
Time : 10:18 AM
Title :
Time : 10:18 AM
Title :
Conduction, convection and radiation
Thermal conduction
Conduction is the process of handing on energy from one bit of stuff to the next, rather like a message in a letter being handed along a line of students from one neighbour to the next.
Before beginning any other experiments, students could touch a number of objects around the room and classify them into those which feel warm to the touch and those which feel cool to the touch. Unless sunlight is falling on them or they are near to a heater:
• all the materials are likely to be at the same temperature
• that temperature is likely to be lower than the temperature of the body.
Thermal energy will flow from the body to the object. In this way students will be able to draw up a crude list of good and bad thermal conductors of energy.
Thermal convection
Energy can be carried by wholesale movement of the medium: a warmer fluid moves, displacing a colder fluid and thus transfers thermal energy in convection currents. This is rather like a student carrying a message in a letter to others rather than just passing it on down the line, as is the case with conduction.
Radiation
Radiation is quite different from conduction and convection. It is not a matter of something hot carrying the energy itself, or of atoms handing the energy on from one to the next. Hot things produce electromagnetic waves and so they cool down, unless we keep on supplying them with energy. When electromagnetic waves hit something, they normally warm it up.
The energy transferred by each photon of electromagnetic radiation is given by hƒ (Planck’s constant multiplied by the frequency of the radiation). All frequencies transfer quanta of energy. The energy transferred by a quantum of ultra-violet radiation is greater than for a quantum of infra-red radiation. However, there is more infra-red radiation emitted from a hot body than a cooler body. One watt of green light gives just as much heating as one watt of infra-red light. There are no special kinds of heat rays or heat radiation. The electromagnetic waves only produce thermal energy when they are absorbed; they transfer no energy as they travel through a completely transparent medium or when being reflected from a perfectly reflecting mirror.
To continue the analogy of transfer of energy with passing on a message: in the case of radiation, the message must be taken to a radio station where it can be transmitted as a radio message from a radio transmitter; you don't expect to see a piece of paper whizzing along with its message in a radio wave.
Thermal conduction
Conduction is the process of handing on energy from one bit of stuff to the next, rather like a message in a letter being handed along a line of students from one neighbour to the next.
Before beginning any other experiments, students could touch a number of objects around the room and classify them into those which feel warm to the touch and those which feel cool to the touch. Unless sunlight is falling on them or they are near to a heater:
• all the materials are likely to be at the same temperature
• that temperature is likely to be lower than the temperature of the body.
Thermal energy will flow from the body to the object. In this way students will be able to draw up a crude list of good and bad thermal conductors of energy.
Thermal convection
Energy can be carried by wholesale movement of the medium: a warmer fluid moves, displacing a colder fluid and thus transfers thermal energy in convection currents. This is rather like a student carrying a message in a letter to others rather than just passing it on down the line, as is the case with conduction.
Radiation
Radiation is quite different from conduction and convection. It is not a matter of something hot carrying the energy itself, or of atoms handing the energy on from one to the next. Hot things produce electromagnetic waves and so they cool down, unless we keep on supplying them with energy. When electromagnetic waves hit something, they normally warm it up.
The energy transferred by each photon of electromagnetic radiation is given by hƒ (Planck’s constant multiplied by the frequency of the radiation). All frequencies transfer quanta of energy. The energy transferred by a quantum of ultra-violet radiation is greater than for a quantum of infra-red radiation. However, there is more infra-red radiation emitted from a hot body than a cooler body. One watt of green light gives just as much heating as one watt of infra-red light. There are no special kinds of heat rays or heat radiation. The electromagnetic waves only produce thermal energy when they are absorbed; they transfer no energy as they travel through a completely transparent medium or when being reflected from a perfectly reflecting mirror.
To continue the analogy of transfer of energy with passing on a message: in the case of radiation, the message must be taken to a radio station where it can be transmitted as a radio message from a radio transmitter; you don't expect to see a piece of paper whizzing along with its message in a radio wave.
Date :
Time : 10:15 AM
Title :
Time : 10:15 AM
Title :
Video about Radiation Waves
by:Sylvia_3n1
by:Sylvia_3n1
Date :
Time : 10:13 AM
Title : Micrometer
Time : 10:13 AM
Title : Micrometer
Date :
Time : 10:12 AM
Title : HOW TO READ A VERNIER CALIPER?
Time : 10:12 AM
Title : HOW TO READ A VERNIER CALIPER?
How to use and read a vernier caliper？
An ordinary vernier caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
The basic steps are as follows:1. Preparation to take the measurement, loosen the locking screw and move the slider to check if the vernier scale works properly. Before measuring, do make sure the caliper reads 0 when fully closed. If the reading is not 0, adjust the caliper’s jaws until you get a 0 reading. If you can’t adjust the caliper, you will have to remember to add to subtract the correct offset from your final reading. Clean the measuring surfaces of both vernier caliper and the object, then you can take the measurement.
2. Close the jaws lightly on the item which you want to measure. If you are measuring something round, be sure the axis of the part is perpendicular to the caliper. Namely, make sure you are measuring the full diameter. An ordinary caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
3. How to read the measured value:
1), Read the centimeter mark on the fixed scale to the left of the 0-mark on the vernier scale. (10mm on the fixed caliper)
2). Find the millimeter mark on the fixed scale that is just to the left of the 0-mark on the vernier scale. (6mm on the fixed caliper)
3). Look along the ten marks on the vernier scale and the millimeter marks on the adjacent fixed scale, until you find the two that most nearly line up. (0.25mm on the vernier scale)
4). To get the correct reading, simply add this found digit to your previous reading. (10mm + 6mm + 0.25mm= 16.25 mm)
4.Maintenance
Clean the surface of the vernier caliper with dry and clean cloth (or soaked with cleaning oil) and stock in a dry environment if it stands idle for a long time.
YAMAN
Link:http://www.tresnainstrument.com/how_to_read_a_vernier_caliper.html
An ordinary vernier caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
The basic steps are as follows:1. Preparation to take the measurement, loosen the locking screw and move the slider to check if the vernier scale works properly. Before measuring, do make sure the caliper reads 0 when fully closed. If the reading is not 0, adjust the caliper’s jaws until you get a 0 reading. If you can’t adjust the caliper, you will have to remember to add to subtract the correct offset from your final reading. Clean the measuring surfaces of both vernier caliper and the object, then you can take the measurement.
2. Close the jaws lightly on the item which you want to measure. If you are measuring something round, be sure the axis of the part is perpendicular to the caliper. Namely, make sure you are measuring the full diameter. An ordinary caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
3. How to read the measured value:
1), Read the centimeter mark on the fixed scale to the left of the 0-mark on the vernier scale. (10mm on the fixed caliper)
2). Find the millimeter mark on the fixed scale that is just to the left of the 0-mark on the vernier scale. (6mm on the fixed caliper)
3). Look along the ten marks on the vernier scale and the millimeter marks on the adjacent fixed scale, until you find the two that most nearly line up. (0.25mm on the vernier scale)
4). To get the correct reading, simply add this found digit to your previous reading. (10mm + 6mm + 0.25mm= 16.25 mm)
4.Maintenance
Clean the surface of the vernier caliper with dry and clean cloth (or soaked with cleaning oil) and stock in a dry environment if it stands idle for a long time.
YAMAN
Link:http://www.tresnainstrument.com/how_to_read_a_vernier_caliper.html
Date :
Time : 10:12 AM
Title :
Time : 10:12 AM
Title :
How to use and read a vernier caliper？
An ordinary vernier caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
The basic steps are as follows:1. Preparation to take the measurement, loosen the locking screw and move the slider to check if the vernier scale works properly. Before measuring, do make sure the caliper reads 0 when fully closed. If the reading is not 0, adjust the caliper’s jaws until you get a 0 reading. If you can’t adjust the caliper, you will have to remember to add to subtract the correct offset from your final reading. Clean the measuring surfaces of both vernier caliper and the object, then you can take the measurement.
2. Close the jaws lightly on the item which you want to measure. If you are measuring something round, be sure the axis of the part is perpendicular to the caliper. Namely, make sure you are measuring the full diameter. An ordinary caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
3. How to read the measured value:1), Read the centimeter mark on the fixed scale to the left of the 0-mark on the vernier scale. (10mm on the fixed caliper)
2). Find the millimeter mark on the fixed scale that is just to the left of the 0-mark on the vernier scale. (6mm on the fixed caliper) 3). Look along the ten marks on the vernier scale and the millimeter marks on the adjacent fixed scale, until you find the two that most nearly line up. (0.25mm on the vernier scale)
4). To get the correct reading, simply add this found digit to your previous reading. (10mm + 6mm + 0.25mm= 16.25 mm)
4.Maintenance
Clean the surface of the vernier caliper with dry and clean cloth (or soaked with cleaning oil) and stock in a dry environment if it stands idle for a long time.
An ordinary vernier caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
The basic steps are as follows:1. Preparation to take the measurement, loosen the locking screw and move the slider to check if the vernier scale works properly. Before measuring, do make sure the caliper reads 0 when fully closed. If the reading is not 0, adjust the caliper’s jaws until you get a 0 reading. If you can’t adjust the caliper, you will have to remember to add to subtract the correct offset from your final reading. Clean the measuring surfaces of both vernier caliper and the object, then you can take the measurement.
2. Close the jaws lightly on the item which you want to measure. If you are measuring something round, be sure the axis of the part is perpendicular to the caliper. Namely, make sure you are measuring the full diameter. An ordinary caliper has jaws you can place around an object, and on the other side jaws made to fit inside an object. These secondary jaws are for measuring the inside diameter of an object. Also, a stiff bar extends from the caliper as you open it that can be used to measure depth.
3. How to read the measured value:1), Read the centimeter mark on the fixed scale to the left of the 0-mark on the vernier scale. (10mm on the fixed caliper)
2). Find the millimeter mark on the fixed scale that is just to the left of the 0-mark on the vernier scale. (6mm on the fixed caliper) 3). Look along the ten marks on the vernier scale and the millimeter marks on the adjacent fixed scale, until you find the two that most nearly line up. (0.25mm on the vernier scale)
4). To get the correct reading, simply add this found digit to your previous reading. (10mm + 6mm + 0.25mm= 16.25 mm)
4.Maintenance
Clean the surface of the vernier caliper with dry and clean cloth (or soaked with cleaning oil) and stock in a dry environment if it stands idle for a long time.
Date :
Time : 10:11 AM
Title :
Time : 10:11 AM
Title :
Date :
Time : 10:10 AM
Title :
Time : 10:10 AM
Title :
Conduction, Convection & Radiation
http://www.wisc-online.com/Objects/ViewObject.aspx?ID=SCE304
http://www.wisc-online.com/Objects/ViewObject.aspx?ID=SCE304
Date :
Time : 10:08 AM
Title : Conduction,Convection and Radiation
Time : 10:08 AM
Title : Conduction,Convection and Radiation
Conduction,Convection an Radiation.
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
Sonam Ramchandani 3N1
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
Sonam Ramchandani 3N1
Date :
Time : 10:07 AM
Title :
Time : 10:07 AM
Title :
Parts of a vernier caliper:
Outside jaws: used to measure external diameter or width of an object
Inside jaws: used to measure internal diameter of an object
Depth probe: used to measure depths of an object or a hole
Main scale: gives measurements of up to one decimal place(in cm).
Main scale: gives measurements in fraction(in inch)
Vernier gives measurements up to two decimal places(in cm)
Vernier gives measurements in fraction(in inch)
Retainer: used to block movable part to allow the easy transferring a measurement
A variation to the more traditional caliper is the inclusion of a vernier scale; this makes it possible to directly
by nicholas
Date :
Time : 10:07 AM
Title : conduction
Time : 10:07 AM
Title : conduction
Date :
Time : 10:06 AM
Title : Answer Key for Assignment 3
Time : 10:06 AM
Title : Answer Key for Assignment 3
Students of 3N1
Plse do your corrections for Assignment 3 as follows:
1) Gas
2) Wooden handle will not be as hot because wood is a poor conductor of heat
3) clockwise direction
4)(a) T (b) T (c) F
5) A
6) B
7) B
8) B
Mr Chio
Plse do your corrections for Assignment 3 as follows:
1) Gas
2) Wooden handle will not be as hot because wood is a poor conductor of heat
3) clockwise direction
4)(a) T (b) T (c) F
5) A
6) B
7) B
8) B
Mr Chio
Labels: Answer Key for Assignment 3
Date :
Time : 10:06 AM
Title :
Time : 10:06 AM
Title :
Convection is the transfer of heat by the actual movement of the warmed matter. Heat leaves the coffee cup as the currents of steam and air rise. Convection is the transfer of heat energy in a gas or liquid by movement of currents. (It can also happen is some solids, like sand.) The heat moves with the fluid. Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water. The warmer portions of the water are less dense and therefore, they rise. Meanwhile, the cooler portions of the water fall because they are denser.
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
Joey
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
Joey
Date :
Time : 10:05 AM
Title :
Time : 10:05 AM
Title :
What is convection?
"Convection" has several, related meanings in weather....but it always involves rising air. It usually refers to "moist convection", where the excess water vapor in rising air parcels condenses to form a cloud. The heat released through this condensation can help to sustain the convection by warming the air further and making it rise still higher, which causes more water vapor to condense, so the process feeds on itself. Convection can also be dry, as occurs on a sunny day over the desert. The sun warms the ground, and convective air currents help to remove the excess heat from the surface. Dry convection also occurs during the day even when clouds are forming...you just can't see it.
Interesting facts:
MAKING THE EARTH LIVEABLE: Convection (both dry and moist) help to make the Earth liveable by removing excess heat from the surface, and transporting it high into the atmosphere. It has been calculated that, without convection, the average surface air temperature on the earth would be about 125 deg. F, rather than the current 59 deg. F.
mukhail
"Convection" has several, related meanings in weather....but it always involves rising air. It usually refers to "moist convection", where the excess water vapor in rising air parcels condenses to form a cloud. The heat released through this condensation can help to sustain the convection by warming the air further and making it rise still higher, which causes more water vapor to condense, so the process feeds on itself. Convection can also be dry, as occurs on a sunny day over the desert. The sun warms the ground, and convective air currents help to remove the excess heat from the surface. Dry convection also occurs during the day even when clouds are forming...you just can't see it.
Interesting facts:
MAKING THE EARTH LIVEABLE: Convection (both dry and moist) help to make the Earth liveable by removing excess heat from the surface, and transporting it high into the atmosphere. It has been calculated that, without convection, the average surface air temperature on the earth would be about 125 deg. F, rather than the current 59 deg. F.
mukhail
Date :
Time : 10:03 AM
Title : vernier caliper
Time : 10:03 AM
Title : vernier caliper
How to read vernier caliper?Instructions.
http://www.physics.smu.edu/~scalise/apparatus/caliper/
Intan Nadhirah 3N1
http://www.physics.smu.edu/~scalise/apparatus/caliper/
Intan Nadhirah 3N1
Date :
Time : 10:03 AM
Title : science RE EDITED
Time : 10:03 AM
Title : science RE EDITED
Convection is the transfer of heat by the actual movement of the warmed matter. Heat leaves the coffee cup as the currents of steam and air rise. Convection is the transfer of heat energy in a gas or liquid by movement of currents. (It can also happen is some solids, like sand.) The heat moves with the fluid. Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water. The warmer portions of the water are less dense and therefore, they rise. Meanwhile, the cooler portions of the water fall because they are denser.
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
BY AMIRUL HAZIQ 3N1 {22}
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
BY AMIRUL HAZIQ 3N1 {22}
Date :
Time : 10:01 AM
Title :
Time : 10:01 AM
Title :
By ,♥Syazwani :D
Date :
Time : 10:01 AM
Title : Convection
Time : 10:01 AM
Title : Convection
Convection is the movement of molecules within fluids (i.e. liquids, gases and rheids). It cannot take place in solids, since neither bulk current flows or significant diffusion can take place in solids.Convection is one of the major modes of heat transfer and mass transfer. Convective heat and mass transfer take place through both diffusion – the random Brownian motion of individual particles in the fluid – and by advection, in which matter or heat is transported by the larger-scale motion of currents in the fluid. In the context of heat and mass transfer, the term "convection" is used to refer to the sum of advective and diffusive transfer.
By Abbas
Reference by http://www.cheresources.com/convection.shtml via wikipedia
By Abbas
Reference by http://www.cheresources.com/convection.shtml via wikipedia
Date :
Time : 10:00 AM
Title :
Time : 10:00 AM
Title :
by: Sylvia_3n1
Date :
Time : 10:00 AM
Title : RADIATION
Time : 10:00 AM
Title : RADIATION
What Is Radiation?
Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are types of radiation that are called nonionizing. The kind of radiation discussed in this document is called ionizing radiation because it can produce charged particles (ions) in matter.
By Nabil.
Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are types of radiation that are called nonionizing. The kind of radiation discussed in this document is called ionizing radiation because it can produce charged particles (ions) in matter.
By Nabil.
Date :
Time : 9:58 AM
Title : Digital vernier caliper
Time : 9:58 AM
Title : Digital vernier caliper
Date : Wednesday, March 3, 2010
Time : 10:03 AM
Title :
Time : 10:03 AM
Title :
Conduction involves transfer of energy and entropy between adjacent molecules, usually a slow process. Convection involves movement of a heated fluid, such as air, usually a fairly rapid process. Radiation refers to the transmission of energy as electromagnetic radiation from its emission at a heated surface to its absorption on another surface, a process requiring no medium to convey the energy.
aidah 3n1
aidah 3n1
Date :
Time : 10:00 AM
Title :
Time : 10:00 AM
Title :
http://www.ucmp.berkeley.edu/education/dynamic/session1/sess1_earthcurrents.html
http://www.answers.com/topic/radiation
Joey.
http://www.answers.com/topic/radiation
Joey.
Date :
Time : 9:59 AM
Title : Science, Radiation.
Time : 9:59 AM
Title : Science, Radiation.
In radiative heat transfer, heat is transferred between bodies by electromagnetic radiation.
Radiation heat transfer is concerned with the exchange of thermal radiation energy between two or more bodies.The heat transferred into or out of an object by thermal radiation is a function of several components. These include its surface reflectivity, emissivity, surface area, temperature, and geometric orientation with respect to other thermally participating objects. In turn, an object's surface reflectivity and emissivity is a function of its surface conditions (roughness, finish, etc.) and composition.
BY AMIRUL HaZiQ
Radiation heat transfer is concerned with the exchange of thermal radiation energy between two or more bodies.The heat transferred into or out of an object by thermal radiation is a function of several components. These include its surface reflectivity, emissivity, surface area, temperature, and geometric orientation with respect to other thermally participating objects. In turn, an object's surface reflectivity and emissivity is a function of its surface conditions (roughness, finish, etc.) and composition.
BY AMIRUL HaZiQ
Date :
Time : 9:57 AM
Title : How to use a micrometer
Time : 9:57 AM
Title : How to use a micrometer
Date :
Time : 9:57 AM
Title :
Time : 9:57 AM
Title :
Date :
Time : 9:56 AM
Title :
Time : 9:56 AM
Title :
Date :
Time : 9:54 AM
Title :
Time : 9:54 AM
Title :
vernier caliper
Ser Yang
Ser Yang
Date :
Time : 9:54 AM
Title : covection-yaman
Time : 9:54 AM
Title : covection-yaman
Convection is the movement of molecules within fluids (i.e. liquids, gases and rheids). It cannot take place in solids, since neither bulk current flows or significant diffusion can take place in solids.
Convection is one of the major modes of heat transfer and mass transfer. Convective heat and mass transfer take place through both diffusion – the random Brownian motion of individual particles in the fluid – and by advection, in which matter or heat is transported by the larger-scale motion of currents in the fluid. In the context of heat and mass transfer, the term "convection" is used to refer to the sum of advective and diffusive transfer.
Link:http://en.wikipedia.org/wiki/Convection YAMAN RANA
Convection is one of the major modes of heat transfer and mass transfer. Convective heat and mass transfer take place through both diffusion – the random Brownian motion of individual particles in the fluid – and by advection, in which matter or heat is transported by the larger-scale motion of currents in the fluid. In the context of heat and mass transfer, the term "convection" is used to refer to the sum of advective and diffusive transfer.
Link:http://en.wikipedia.org/wiki/Convection YAMAN RANA
Date :
Time : 9:54 AM
Title : Conduction
Time : 9:54 AM
Title : Conduction
conduction is the process by which thermal energy is transmitted from a region of higher temperature to a region of lower temperature by the vibration of atoms and molecules.
By SHAFIQ.
By SHAFIQ.
Date :
Time : 9:54 AM
Title :
Time : 9:54 AM
Title :
Three Methods of Heat Transfer:Conduction, Convection and Radiation
http://www.vtaide.com/png/heat2.htm
by: Ivy
http://www.vtaide.com/png/heat2.htm
by: Ivy
Date :
Time : 9:53 AM
Title :
Time : 9:53 AM
Title :
Using the vernier calipers and micrometer screw gauge
http://www.phy.uct.ac.za/courses/c1lab/vernier1.html
by: Sylvia_3n1
http://www.phy.uct.ac.za/courses/c1lab/vernier1.html
by: Sylvia_3n1
Date :
Time : 9:52 AM
Title : Convection, Conduction and Radiation
Time : 9:52 AM
Title : Convection, Conduction and Radiation
About Convection, Conduction and Radiation
Convection is the transfer of heat by the actual movement of the warmed matter. Heat leaves the coffee cup as the currents of steam and air rise. Convection is the transfer of heat energy in a gas or liquid by movement of currents. (It can also happen is some solids, like sand.) The heat moves with the fluid. Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water. The warmer portions of the water are less dense and therefore, they rise. Meanwhile, the cooler portions of the water fall because they are denser.
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
How a radiometer works: You need to focus on the edges of the vanes to explain the behavior of the radiometer. Heat excites the black surface of the vanes more than it heats the white surface. Black is a good absorber and a good radiator. Think of black as a large doorway that allows heat to pass through easily. In contrast, white is a poor absorber and a poor radiator of energy. White is like a small doorway and will not allow heat to pass easily.
The difference in temperature between the warm, black side and the cooler white side causes gasses to creep along the surface of the vanes. This effect is known as "thermal creep." The faster gasses from the black side strike the edges of the vane at an angle with more force than the molecules from the cold side. The equal and opposite forces cause the radiometer to spin. More information about this.
Why a radiometer runs backwards after the light is turned off. Heat escapes quickly from the black sides of the vanes. Thus, the black molecules cool off first. Meanwhile, the white molecules take longer to lose heat cool down. The result is that gasses from the white vane push off with more force (Newton's third law) and the vanes spin in the opposite direction.
Adapted From;http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
By:Choo Jia Wei
Convection is the transfer of heat by the actual movement of the warmed matter. Heat leaves the coffee cup as the currents of steam and air rise. Convection is the transfer of heat energy in a gas or liquid by movement of currents. (It can also happen is some solids, like sand.) The heat moves with the fluid. Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water. The warmer portions of the water are less dense and therefore, they rise. Meanwhile, the cooler portions of the water fall because they are denser.
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
How a radiometer works: You need to focus on the edges of the vanes to explain the behavior of the radiometer. Heat excites the black surface of the vanes more than it heats the white surface. Black is a good absorber and a good radiator. Think of black as a large doorway that allows heat to pass through easily. In contrast, white is a poor absorber and a poor radiator of energy. White is like a small doorway and will not allow heat to pass easily.
The difference in temperature between the warm, black side and the cooler white side causes gasses to creep along the surface of the vanes. This effect is known as "thermal creep." The faster gasses from the black side strike the edges of the vane at an angle with more force than the molecules from the cold side. The equal and opposite forces cause the radiometer to spin. More information about this.
Why a radiometer runs backwards after the light is turned off. Heat escapes quickly from the black sides of the vanes. Thus, the black molecules cool off first. Meanwhile, the white molecules take longer to lose heat cool down. The result is that gasses from the white vane push off with more force (Newton's third law) and the vanes spin in the opposite direction.
Adapted From;http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
By:Choo Jia Wei
Date :
Time : 9:52 AM
Title :
Time : 9:52 AM
Title :
Radiation and radioisotopes are extensively used medications to allow physicians to image internal structures and processes in vivo (in the living body) with a minimum of invasion to the patient. Higher doses of radiation are also used as means to kill cancerous cells.
Radiation is actually a term that includes a variety of different physical phenomena. However, in essence, all these phenomena can be divided into two classes: phenomena connected with nuclear radioactive processes are one class, the so-called radioactive radiation (RR); electromagnetic radiation (EMR) may be considered as the second class.
Both classes of radiation are used in diagnoses and treatment of neurological disorders.
(Aaron)
Radiation is actually a term that includes a variety of different physical phenomena. However, in essence, all these phenomena can be divided into two classes: phenomena connected with nuclear radioactive processes are one class, the so-called radioactive radiation (RR); electromagnetic radiation (EMR) may be considered as the second class.
Both classes of radiation are used in diagnoses and treatment of neurological disorders.
(Aaron)
Date :
Time : 9:51 AM
Title : Reading Vernier
Time : 9:51 AM
Title : Reading Vernier
Date :
Time : 9:51 AM
Title :
Time : 9:51 AM
Title :
Current in a fluid caused by uneven distribution of heat. For example, air on a part of the Earth's surface warmed by strong sunlight will be heated by contact with the ground and will expand and flow upward, creating a region of low pressure below it; cooler surrounding air will then flow in to this low pressure region. The air thus circulates by convection, creating winds.
(Aaron)
(Aaron)
Date :
Time : 9:50 AM
Title : Heat Transfer
Time : 9:50 AM
Title : Heat Transfer
Conduction
Conduction is the heat transfer of heat between substances that are in direct contact with each other. The better the conductor, the more rapidly heat will transfer.
Zulfiqar 3N1.
Conduction is the heat transfer of heat between substances that are in direct contact with each other. The better the conductor, the more rapidly heat will transfer.
Zulfiqar 3N1.
Date :
Time : 9:50 AM
Title :
Time : 9:50 AM
Title :
http://en.wikipedia.org/wiki/Convection
http://en.wikipedia.org/wiki/Heat_conduction'
http://en.wikipedia.org/wiki/Radiation
By George
http://en.wikipedia.org/wiki/Heat_conduction'
http://en.wikipedia.org/wiki/Radiation
By George
Date :
Time : 9:50 AM
Title :
Time : 9:50 AM
Title :
Date :
Time : 9:49 AM
Title :
Time : 9:49 AM
Title :
How to use and read a vernier caliper？
Link: http://www.tresnainstrument.com/how_to_read_a_vernier_caliper.html
kirby
Link: http://www.tresnainstrument.com/how_to_read_a_vernier_caliper.html
kirby
Date :
Time : 9:47 AM
Title :
Time : 9:47 AM
Title :
Date :
Time : 9:46 AM
Title : Zhenghan
Time : 9:46 AM
Title : Zhenghan
How to read a vernier caliper:
by Zhenghan
by Zhenghan
Date :
Time : 9:46 AM
Title :
Time : 9:46 AM
Title :
Date :
Time : 9:44 AM
Title :
Time : 9:44 AM
Title :
go see eureka convection http://www.youtube.com/watch?v=5pG-tkbQgMo
Date :
Time : 9:42 AM
Title :
Time : 9:42 AM
Title :
Why do Eskimos build their igloos from snow, not ice?
Date :
Time : 9:41 AM
Title :
Time : 9:41 AM
Title :
Video about Convection
by: Sylvia Ng_3n1
by: Sylvia Ng_3n1
Date :
Time : 9:41 AM
Title :
Time : 9:41 AM
Title :
Date :
Time : 9:40 AM
Title :
Time : 9:40 AM
Title :
Why does carpet feel warmer to bare feet than lino or concrete?
Date :
Time : 9:38 AM
Title :
Time : 9:38 AM
Title :
Date :
Time : 9:38 AM
Title :
Time : 9:38 AM
Title :
By Joey. =P
Date :
Time : 9:31 AM
Title :
Time : 9:31 AM
Title :
wah if can use this for practical gd liao
Date :
Time : 9:29 AM
Title : Convection, Conduction, Radiation
Time : 9:29 AM
Title : Convection, Conduction, Radiation
Convection is the transfer of heat by the actual movement of the warmed matter.
Heat leaves the coffee cup as the currents of steam and air rise.
Convection is the transfer of heat energy in a gas or liquid by movement of currents.
(It can also happen is some solids, like sand.)
The heat moves with the fluid.
Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water.
The warmer portions of the water are less dense and therefore, they rise.
Meanwhile, the cooler portions of the water fall because they are denser.
Conduction is the transfer of energy through matter from particle to particle.
It is the transfer and distribution of heat energy from atom to atom within a substance.
For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon.
Conduction is most effective in solids-but it can happen in fluids.
Fun fact: Have you ever noticed that metals tend to feel cold?
Believe it or not, they are not colder!
They only feel colder because they conduct heat away from your hand.
You perceive the heat that is leaving your hand as cold.
Radiation, Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
more: http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
by,
Stephanie(:
Heat leaves the coffee cup as the currents of steam and air rise.
Convection is the transfer of heat energy in a gas or liquid by movement of currents.
(It can also happen is some solids, like sand.)
The heat moves with the fluid.
Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water.
The warmer portions of the water are less dense and therefore, they rise.
Meanwhile, the cooler portions of the water fall because they are denser.
Conduction is the transfer of energy through matter from particle to particle.
It is the transfer and distribution of heat energy from atom to atom within a substance.
For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon.
Conduction is most effective in solids-but it can happen in fluids.
Fun fact: Have you ever noticed that metals tend to feel cold?
Believe it or not, they are not colder!
They only feel colder because they conduct heat away from your hand.
You perceive the heat that is leaving your hand as cold.
Radiation, Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
more: http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
by,
Stephanie(:
Date : Tuesday, March 2, 2010
Time : 8:54 PM
Title : By, Christin Chia.
Time : 8:54 PM
Title : By, Christin Chia.
Date :
Time : 5:46 PM
Title :
Time : 5:46 PM
Title :
RADIATION
http://www.youtube.com/watch?v=wz6wzOtv6rs
CONDUCTION
http://www.youtube.com/watch?v=77R4arwD8G8
CONVECTION
http://www.youtube.com/watch?v=5pG-tkbQgMo
http://www.youtube.com/watch?v=wz6wzOtv6rs
CONDUCTION
http://www.youtube.com/watch?v=77R4arwD8G8
CONVECTION
http://www.youtube.com/watch?v=5pG-tkbQgMo
Date :
Time : 5:46 PM
Title :
Time : 5:46 PM
Title :
dear 3n1, please type your name after posting or blogging ! thank you!
izzati
izzati
Date :
Time : 5:44 PM
Title :
Time : 5:44 PM
Title :
Using the vernier calipers and micrometer screw gauge
http://www.phy.uct.ac.za/courses/c1lab/vernier1.html
by: Sylvia_3n1
http://www.phy.uct.ac.za/courses/c1lab/vernier1.html
by: Sylvia_3n1
Date :
Time : 5:41 PM
Title : Convection microwave
Time : 5:41 PM
Title : Convection microwave
English: A convection microwave is a combination of a standard microwave oven, and a convection oven. It allows food cooked in the convection microwave to be cooked quickly, yet come out browned or crisped, as in a convection oven. For example, a convection microwave oven can be preheated to bake cakes whereas it is not possible with standard microwave ovens.
Convection microwaves were initially considered to be high-end kitchen appliances. They were more expensive than a conventional microwave. Over time the price of convection microwaves has dropped and can be bought for around the same price as a conventional microwave.
Companies such as Wolf, GE, Sharp, and Panasonic all currently produce convection microwaves.
Adapted From:http://en.wikipedia.org/wiki/Convection_microwave
By: Choo Jia Wei
Convection microwaves were initially considered to be high-end kitchen appliances. They were more expensive than a conventional microwave. Over time the price of convection microwaves has dropped and can be bought for around the same price as a conventional microwave.
Companies such as Wolf, GE, Sharp, and Panasonic all currently produce convection microwaves.
Adapted From:http://en.wikipedia.org/wiki/Convection_microwave
By: Choo Jia Wei
Date :
Time : 5:40 PM
Title : radiation
Time : 5:40 PM
Title : radiation
What Is Radiation?
- Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are types of radiation that are called nonionizing. The kind of radiation discussed in this document is called ionizing radiation because it can produce charged particles (ions) in matter
Nabil.
- Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are types of radiation that are called nonionizing. The kind of radiation discussed in this document is called ionizing radiation because it can produce charged particles (ions) in matter
Nabil.
Date :
Time : 5:40 PM
Title : Micrometer
Time : 5:40 PM
Title : Micrometer
Micrometer_
http://www.technologystudent.com/equip1/microm1.htm
A micrometer is also known as a micrometer screw gauge.It is a device used widely in mechanical engineering and machining.
Farah_3N1
http://www.technologystudent.com/equip1/microm1.htm
A micrometer is also known as a micrometer screw gauge.It is a device used widely in mechanical engineering and machining.
Farah_3N1
Date :
Time : 5:40 PM
Title : Conduction,Convection,Radiation
Time : 5:40 PM
Title : Conduction,Convection,Radiation
Conduction
Conduction is the transfer of thermal energy between neighboring molecules in a substance due to a temperature gradient. It takes from higher temperature to lower temperature.
Convection
Process by which heat is transferred by movement of a heated fluid such as air or water. Most fluids expand when heated.
Radiation
Process by which energy is emitted by a warm surface.
Intan Nadhirah
Conduction is the transfer of thermal energy between neighboring molecules in a substance due to a temperature gradient. It takes from higher temperature to lower temperature.
Convection
Process by which heat is transferred by movement of a heated fluid such as air or water. Most fluids expand when heated.
Radiation
Process by which energy is emitted by a warm surface.
Intan Nadhirah
Date :
Time : 5:38 PM
Title : conduction,convection
Time : 5:38 PM
Title : conduction,convection
Convection is the transfer of heat by the actual movement of the warmed matter. Heat leaves the coffee cup as the currents of steam and air rise. Convection is the transfer of heat energy in a gas or liquid by movement of currents. (It can also happen is some solids, like sand.) The heat moves with the fluid. Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water. The warmer portions of the water are less dense and therefore, they rise. Meanwhile, the cooler portions of the water fall because they are denser.
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
helmi(27) 3n1
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
helmi(27) 3n1
Date :
Time : 5:33 PM
Title : Conduction
Time : 5:33 PM
Title : Conduction
How is heat transfer by conduction?
mukhail
3n1
mukhail
3n1
Date :
Time : 5:31 PM
Title :
Time : 5:31 PM
Title :
Convection, Conduction & Radiation song
lyrics
There are three ways that heat can travel
But it can travel in any direction
From the sun it moves to the earth,
quick as a shadow
And disperses in radiation, conduction, and convection
Verse I
First things first, let’s discuss heat
What it is before you pay for it to warm your feet
Heat is the energy that flows when atoms and molecules move
It diffuses out toward coolness
Temperature is the measurement of
The average motion of these atoms
And molecules in the atmosphereSo there have it
Now, the first way of transportation of heat energy is radiation
Like sound waves from your radio stationsFilling the empty space around youYour radiator warms you, but don’t start a fire now,
I warned you
Heat is going through radiation from the sun
Before it burns you from 93 million miles away
To re-radiate this heat is what the earth does for you
This is survival what this heat is going through
Before it rises to the sky and it’s gone so…
Chorus
Verse II
conduction is the second method on my list
You can feel it like a hot pot on your fist
With the handle gripped
I bet you’d rather grab a candle lit
‘Cause it’s heat through conduction that causes this
Atoms in matter in a fixed position vibrate when heated
Like a pan in the kitchen
Transmit the heat energy to atoms next to them
That are cooler than they are to cause equilibrium
To even out the temperature the heat has to travel
Up the spoon in your tea in the morning with your bagel
It might burn your hand, but just learn the land ofconduction heat energy until you understand
The earth gains little from conductionIt’s mostly radiation that helps us function and keeps us warmIt’s just another way for heat to move
But now let’s move on to method three to prove…
Chorus
Verse III
Convection is the movement of heat in liquids and gasses
To even out the temperature fastest
This process is called diffusion
It’s a flow of particles cold and hot in a fluid
If you’re not listening, then stop what you’re doing
‘Cause this final mode that heat can move in
And this affects you everyday
It’s the breeze at your back and the wind at your face
When heat reaches the earth it rises at a rate
With the air in the place and it moves up till it cools
Trillions of molecules together
Make up the weather that we see on the news
It’s how they measure the pressure of the air and the temperature
But convection is how it got there in the atmosphere
So don’t be scared.
Heat moves in three ways
So we made things clear, it’s like…
Read more: http://www.educationalrap.com/song/radiation-conduction-convection.html#related#ixzz0h4em0bwd
cannot put the song!! don't know why?? hope it's not kinda of lame thinggy.. :PP
annisaa
lyrics
There are three ways that heat can travel
But it can travel in any direction
From the sun it moves to the earth,
quick as a shadow
And disperses in radiation, conduction, and convection
Verse I
First things first, let’s discuss heat
What it is before you pay for it to warm your feet
Heat is the energy that flows when atoms and molecules move
It diffuses out toward coolness
Temperature is the measurement of
The average motion of these atoms
And molecules in the atmosphereSo there have it
Now, the first way of transportation of heat energy is radiation
Like sound waves from your radio stationsFilling the empty space around youYour radiator warms you, but don’t start a fire now,
I warned you
Heat is going through radiation from the sun
Before it burns you from 93 million miles away
To re-radiate this heat is what the earth does for you
This is survival what this heat is going through
Before it rises to the sky and it’s gone so…
Chorus
Verse II
conduction is the second method on my list
You can feel it like a hot pot on your fist
With the handle gripped
I bet you’d rather grab a candle lit
‘Cause it’s heat through conduction that causes this
Atoms in matter in a fixed position vibrate when heated
Like a pan in the kitchen
Transmit the heat energy to atoms next to them
That are cooler than they are to cause equilibrium
To even out the temperature the heat has to travel
Up the spoon in your tea in the morning with your bagel
It might burn your hand, but just learn the land ofconduction heat energy until you understand
The earth gains little from conductionIt’s mostly radiation that helps us function and keeps us warmIt’s just another way for heat to move
But now let’s move on to method three to prove…
Chorus
Verse III
Convection is the movement of heat in liquids and gasses
To even out the temperature fastest
This process is called diffusion
It’s a flow of particles cold and hot in a fluid
If you’re not listening, then stop what you’re doing
‘Cause this final mode that heat can move in
And this affects you everyday
It’s the breeze at your back and the wind at your face
When heat reaches the earth it rises at a rate
With the air in the place and it moves up till it cools
Trillions of molecules together
Make up the weather that we see on the news
It’s how they measure the pressure of the air and the temperature
But convection is how it got there in the atmosphere
So don’t be scared.
Heat moves in three ways
So we made things clear, it’s like…
Read more: http://www.educationalrap.com/song/radiation-conduction-convection.html#related#ixzz0h4em0bwd
cannot put the song!! don't know why?? hope it's not kinda of lame thinggy.. :PP
annisaa