Physics, 23.07.2019 08:00, haileysolis5
How many shells does the element neon have? a.1 b.2 c.8 d.18
Answers: 2
Physics, 21.06.2019 15:00, gabbym39077
What is the frequency of a light wave with a wavelength of 620nm
Answers: 2
Physics, 22.06.2019 03:30, zahradawkins2007
As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.
Answers: 3
Physics, 22.06.2019 07:30, carlinryan
Which of the following is an example of motion in two dimensions?
Answers: 3
How many shells does the element neon have? a.1 b.2 c.8 d.18...
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