Aboulder that is resting on the top of a cliff slips over the edge and accelerates towards the ground. as the rock falls, the amount of kinetic energy a) increases. b) decreases. c) stays the same. d) increases then decreases.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

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.