The planet Alderaan has a mass of 6.29*10^ 24 kg and a radius of 5940 km. It rotates on its axis once every 3.7 hours. (a) Calculate the apparent weight of a 75 kg astronaut on the equator of Alderaan. (b) Alderaan has moon that circles the planet once every 38.2 hours. What is the radius of the moon's orbit?

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Rohit is trying to tune an instrument

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.