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the energy steam energy the energy source heat engines coal Electrical energy coal Second Law efficiencies First Law efficiencies heating a house to 70 F with combustion of gas steam
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#133
heat energy to other, more useable, forms of energy... such as motion (car)... or electricity
one of our main forms of energy storage
on how well the energy source is matched to the need... for example
on how the energy is produced
only about 5% efficient
a turbine