What is the magnitude of the centripetal force that must be applied in order for a

0.5 kg ball on a 2.0 m string to spin with

uniform circular motion at 5.0 m/s?

The two required components for a generator

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

How many atoms of nitrogen are in the chemical formula ni(w on