The work done to lift the metal cylinders while winding the clock is the
same as the work done by the force of gravity lowering the cylinders
while the clock runs. Why is the power to run the clock so much less than
the power to wind the clock?*

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

How is the acceleration of an object in uniform circular motion constant? a - in magnitude only b - in direction only c - in both magnitude and direction d - in magnitude, direction & orientation