Just to verify...
Measurements of which of the following would be sufficient to calculate the usable work performed by a mechanical engine?
A) The rate at which energy is consumed by the engine and the amount of time the engine
was running
B) The heat produced by the engine and the amount of time the engine was running
C) The power output of the engine and the amount of time the engine was running
D) The energy consumed by the engine and the amount of time the engine was running
Answer:C
I was debating between A and C.
What is the difference between A and C? Is A wrong because of the possibility that the machine doesn't have 100% efficiency??
Measurements of which of the following would be sufficient to calculate the usable work performed by a mechanical engine?
A) The rate at which energy is consumed by the engine and the amount of time the engine
was running
B) The heat produced by the engine and the amount of time the engine was running
C) The power output of the engine and the amount of time the engine was running
D) The energy consumed by the engine and the amount of time the engine was running
Answer:C
I was debating between A and C.
What is the difference between A and C? Is A wrong because of the possibility that the machine doesn't have 100% efficiency??