I thought internal energy was usually called U
Q is like heat flowing into a pot from the flame beneath
W is like a piston moving and pushing a connecting rod
U is like the water in the pot turning from cold to hot, storing energy provided by the flame beneath
Heat transfer Q and work done W are always energy in transit, whereas internal energy E is energy
stored in a system. Give an example of each type of energy, and state specifically how it is either in
transit or resides in a system.
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