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Air is compressed steadily in a compressor from 100kPa and 300 K to 1 Mpa and 500 K. The compressor is not well insulated and a heat loss of 40 KJ/kg occurs during the process. Assuming the changes in kinetic and potential energies are negligible, determine the specific work input to the compressor, in kj/kg.
suppose an external torque t1 is applied to shaft 1 which has polar area moment of inertia j1. gear 1 is mounted on
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drew drops a snowball from the roof of a building attempting to hit the top of a students head. evaporation causes the
a well contains methane gas occupying the upper 6000 ft of annulus. the mean gas temperature is 170of and the surface
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A particle traveled in a straight line in such a way that its distance (S) from a given point on that line after time (t) was S= 20t^3 -t^4 The rate of change of acceleration at time t=2 is what value?
Air is contained in a piston-cylinder assembly, initially at 40 lbf/in^2 and 600R. The air expands in a polytropic process with n=k=1.4 until the volume is doubled. Modeling the air as an ideal gas with constant specific heats,
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a heat pump uses a 100000 gallon swimming pool as a heat source in the winter. when the heat pump is running at full
An inventor claims to have developed a power cycle operating between hot and cold reservoirs at 1175 K and 295 K, respectively, that provides a steady-state power output of (a) 28 kW, (b) 31.2 kW, while receiving energy by heat transfer from the hot ..
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