New+Stuff

Some extra notes:
 * __Thermal Physics__**

__**Heat engine**__ Below is a schematic diagram of heat engine.

Heat is put into the system. T(H) is the temperature of the hot source (e.g. burning coal) and T(C) is the temperature of the cold sink (e.g. the air in the room). A heat engine is a device that will take energy from a hot body and use it to do mechanical work. All thermal power stations make use of heat engines - by using high pressure steam to turn turbines and generators.

Q(H) Represents the heat transferred from the hot source Q(C) Represents the heat transferred to the cold sink W is the work done by the machine.

See page 61 to find out how to calculate efficiency. Heat Pump