Physics, 30.06.2019 03:40 abdulbasharee99
Water vapor within a piston-cylinder assembly is at a temperature of 360 °c and a pressure of 1.5 bar. the piston then compresses, and the air is now at a pressure of 60 bar and a temperature of 640 °c. consider the cross sectional area of the piston to be 1.5 m 2 , the initial length of the chamber as 3m, with 40 kj of heat transferred to the surroundings. using the ideal gas model, determine: a. the mass of water vaporb. the work done on the system in the process
Answers: 3
Physics, 22.06.2019 10:30
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
Physics, 22.06.2019 13:30
The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?
Answers: 1
Physics, 22.06.2019 15:10
Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground
Answers: 3
Water vapor within a piston-cylinder assembly is at a temperature of 360 °c and a pressure of 1.5 ba...
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