Infra red radiation is absorbed and emitted by all objects- Dark, matte materials are both good absorbers and good emitters of radiation.
- Light, shiny materials are both bad absorbers and bad emitters of radiation.
Infra red radiation is absorbed and emitted by all objects- The kinetic particle theory explains what properties different states of matter possess.
- Heat can move from one place to another by conduction, convection or radiation.
- Heat is able to move through solids by conduction. Energy moves from a hot to a cold region via free electrons.
- Metals are good conductors.
- A substance which is a bad conductor is called an insulator.
- Heat is able to move through liquids and gases by convection. Heat energy moves from a cooler to a hotter region by convection currents
Matter can change its state through evaporation and condensation.- In evaporation liquid particles reach a high enough energy level for them to escape from a liquid and form a gas.
Matter can change its state through evaporation and condensation.- In condensation gas particles cool down and form bonds, releasing energy and forming a liquid.
- The shape and dimensions of a body and the difference in temperature between a body and its surroundings affects the rate at which heat is transferred.
- Insulating materials are used in buildings to minimise heat loss.
- payback time = cost of installation savings per year in fuel costs
- Solar panels create energy by using the sun’s rays to heat up water.
- Heat us the thermal energy within an object and temperature is hot hot an object it.
- The specific heat capacity of a particular substance refers to how much energy is required to increase 1 kg of it by 1