P2 - heat stuff

• heat goes from hot to cold
• metals are good conductors of heat
• conduction only occurs in solids
• hot particles vibrate a lot, cool particles vibrate a little
• fast moving particles collide with neighbouring particles, this gives them more energy making them vibrate faster. This then continues along the length of the solid until all the particles are vibrating with lots of energy
• energy transferred = power x time
• Power = voltage x current
• specific heat capacity is the amount of energy needed to raise the temperature of 1kg of a substance by 1 degree
• E = Mc0
• 0 = temperature change
• mc - specific heat capacity
• The amount of energy depends on, material, temperature change and the mass of the object
• Temperature shows how much kinetic energy the particles in the substance has. Heat is energy that the total substance depends on amount and temperature. A smaller object with the same temperature as a bigger object will have less heat energy. If two objects are the same size, the one with the lower temperature will have less heat energy
• Putting the same amount of heat into some materials gives a bigger temperature rise than in other materials
• If two objects are the same size the one with the lower temperature will have less heat energy