Answers: 2
Physics, 22.06.2019 03:30
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 07:50
Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).
Answers: 3
Physics, 23.06.2019 01:00
The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?
Answers: 3
Physics, 23.06.2019 04:31
Abowling ball rolls 32 meters in 0.8 seconds what is the average speed in m/s of the bowling ball in m/s
Answers: 2
AJUDEM ME POR FAVOR URGENTE! :(
2. Considere uma máquina elétrica de potência 65 W, com um rendimen...
Mathematics, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
Social Studies, 24.01.2020 02:31
Health, 24.01.2020 02:31
Physics, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
English, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
Social Studies, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
Social Studies, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31