A heat engine is built to operate between temperatures of 1200 K and 300 K. It is used to lift a 30 kg mass at a constant velocity of 4 m/s.
a) Determine the power that the heat engine must supply to lift the mass.
b) Determine the maximum possible efficiency of the heat engine.
c) If the engine were to operate at the maximum possible efficiency, determine the following:
i. The rate at which the hot reservoir supplies heat to the engine.
ii. The rate at which heat is exhausted to the cold reservoir.
P = W/t
e = 1 - T1/T2
The Attempt at a Solution
I figured out that (b) is 1 - (300/1200) = 75%.
For (a), there is no distance stated to figure out work (W = Fd), and there is no time to determine power (P = W/t). What am I missing?