Heat is a form of energy. Sometimes called thermal energy.
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What does heat energy flow from and too?
Heat energy always flows from a hot place to a cold place. Temperature is a measure of how hot something is, measured with a temperature in degrees celsius ('c). The amount of heat energy something has depends upon both its length and its size.
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What is energy needed to heat up?
Energy is needed to heat anything up e.g. Immersion heater, Burning gas, Priction
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What is S.H.C?
All substances have a S.H.C., it is the energy required to heat up 1kg of that substance by 1'c for water, S.H.C is roughly 4200J/Kg/'C.
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What is the energy formula?
Energy (in J)= mass of object (in Kg) x S.H.C (J/Kg/'C) x change in temperature ('C).
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What is the energy to melting or evaporate formula?
Energy (to melt or evaporate)=latent heat (of melting or evaporating) x mass (in Kg)
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Are metals good conductors of heat?
Metals are good conductors of heat, but some are better than others. Makes the 'atoms' vibrate more- they knock into each other like dominoes.
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What is a sound wave?
Sound is the only longitudinal wave, all others are transverse.
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What are the 5 main electro-magnetic spectrum.
Y-ray, X-ray, U-V, Visible, I-R.
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How do microwave ovens work?
Microwaves travel about 2cm into potato. Flip the water and fat molecules causing them to heat up.
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How can we collect energy from the sun?
Solar panels for hot water/ electricity.
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How does the solar panel work?
Light energy knocks out electrons from solar panel (silicon wafer) is your electrical current.
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What happens when i move the wire in the magnetic field?
Get current flowing.
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What happens if i move it faster?
Bigger current.
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What happens if i move it in the opposite direction?
Current change direction.
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What about if i keep the wire still and more the magnet?
Current still flows.
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How can i make a bigger current?
Bigger magnet, more wire/coil and move it faster.
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Card 2
Front
What does heat energy flow from and too?
Back
Heat energy always flows from a hot place to a cold place. Temperature is a measure of how hot something is, measured with a temperature in degrees celsius ('c). The amount of heat energy something has depends upon both its length and its size.
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