A ball is thrown straight upward and returns to the thrower's hand after 3.05 s in the air. A second ball thrown at an angle of 28.0° with the horizontal reaches the same maximum height as the first ball. At what speed was the first ball thrown?

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.