An example of the transfer of energy between systems through work is the expansion of gas in a steam engine or car piston. Explain the energy transfer process.
A) Steam engines and pistons both expand as pressure is exerted within them and they go on to accomplish work like moving a train.
B) Energy is converted to work as the expansion of the steam engine occurs and the gas collides with the internal steam engine parts.
C) The rapidly moving particles of the expanding gas is doing work on the piston and energy is transferred from the gas to the piston.
D) The quick moving parts of the expanding steam engine is doing work on the piston and energy is transferred from the engine to the piston.