Physics, 18.07.2019 00:40 aliyahedwards94
What is the change in the internal energy, in btu/lbm, of air as its temperature changes from 100 to 200°f? is there any difference if the temperature were to change from 0 to 100°f? the constant-volume specific heat of air at room temperature is cv = 0.171 btu/lbm·r. consider the variation of specific heat with temperature. cv = 0.1725 btu/lbm·r at 150°f and cv = 0.1712 btu/lbm·r at 50°f.
Answers: 2
Physics, 22.06.2019 06:20
Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.
Answers: 1
Physics, 22.06.2019 10:30
Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.
Answers: 1
Physics, 22.06.2019 13:50
The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?
Answers: 2
What is the change in the internal energy, in btu/lbm, of air as its temperature changes from 100 to...
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