Physics Worksheet: F weight = mass * gravity Fw= m* g m= Fw/ g g = Fw/m

1. A spaceship has a mass of 9000 kg. The spaceship is launched from Earth and lands on a
distant planet where it has a weight of 390,000 N. What is the acceleration of gravity on this planet?
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S

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.