Physics module 1 Exam 2010

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Temperature is a measure of how hot something is, using a chosen scale.

Heat is a measurement of energy, it is measured in joules.

Temperature can be represented by a thermogram, yellow shows where heat is escaping.

If there is a difference in temperature between an object and it's surroundings then heat energy flows from the hotter region to the cooler one.

If an objects temperature rises it is taking in heat.

If an objects temperature drops, it is giving out heat.

Objects with a very high temperature will cool down very quickly. As the temperature drops the object will cool down at a slower rate.

Energy needed to raise temperature depends on : objects mass; temperature change required; material object is made from; objects mass; temperature change required and the material the object is made from.

Specific heat capacity is how much energy a material can hold. It is the energy needed to raise the temperature of 1kg of material by 1 degree.

Specific heat capacity is how much energy a material can hold. It is the energy needed to raise the temperature of 1kg of material by 1 degree.

Specific heat capacity is how much energy a material can hold. It is the energy needed to raise the temperature of 1kg of material by 1 degree.

The temperature of a material doesn't change when a material is changing state.

Waters temperature will never raise above 100 degrees.

During mealting and boiling of water, the energy supplied is used to break intermolecular bonds as water molecules change state the temperature doesn't change.

Specific latent heat is the energy required to melt 1kg of material.

Specific latent heat is the energy required to melt 1kg of material.

Specific latent heat is the energy required to melt 1kg of material.

Materials that allow energy to spread through them quickly are conductors.

Materials that allow material to spread through them slowly are insulators.

Fibre glass reduces conduction and convection, they trap layers of air between the fibres.

Reflective foil on walls reduces radiation, by reflecting heat back into the room.

Cavity wall insulation reduces conduction and convection by trapping air in the foam.

Double glazing reduces conduction and convection by trapping air between the panes.

Draught excluders reduce conduction by keeping as much warm air inside as possible.

Energy efficiency is a measure of how good and appliance is at converting input energy to output energy.

Air is a good insulator, so if it's trapped in a material, then it to will be an insulator.

Heat doesn't stay in one place: hot air rises and is replaced by cooler air.

Conduction is the transfer of heat energy from a hotter region to a cooler one. As a substance is heated, the kinetic energy of particles increases. The kinetic energy is transfered between the particle and along the substance.

Conduction is the transfer of heat energy from a hotter region to a cooler one. As a substance is heated, the kinetic energy of…

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