Physics, 06.12.2020 02:50 Supermonkey6425
A ball with an unknown mass mA is initially a distance hA above the surface of the planet Alderaan. A box with an unknown mass mE is initially a distance hE above the surface of the Earth. Both the ball on Alderaan and the box on Earth have the same GPE relative to the surface of each respective planet. Both the ball on Alderaan and the box on Earth are then dropped from rest, and each is caught by a person standing on the surface that planet. The person on Alderaan and the person on Earth each apply the same impulse while catching the ball and the box respectively. If the ball on Alderaan was dropped from an initial height of hA = 10.1 m, what was the initial height hE, of the box on Earth before it was dropped? The mass of Alderaan is 7.2 × 1024 kg, its radius is 6.36 × 106 m, and G = 6.67 × 10−11Nm2/kg2. (ignore any air resistance, and use 9.8m/s2 for the gravitational field strength of the Earth) Answer in units of m.
Answers: 1
Physics, 22.06.2019 10:30, gyexisromero10
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.
Answers: 2
A ball with an unknown mass mA is initially a distance hA above the surface of the planet Alderaan....
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