The mass of an astronaut in space will be:
c
the same as on earth
greater than on earth
less than on earth

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

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.

Why do astronauts in the space shuttle weigh less?