How long does it take you to create 200 Watts of power if you use 1000 J of
work?

Which type of microscope would allow the viewer to see ribosomes inside a cell?

Why should seat belts not be mandatory quick plz

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.