Answers: 3
Physics, 21.06.2019 16:00
As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.
Answers: 1
Physics, 21.06.2019 19:30
Aparticle travels in a circular orbit of radius 21 m. its speed is changing at a rate of 23.1 m/s2 at an instant when its speed is 37.2 m/s. what is the magnitude of the acceleration (in m/s? ) of the particle?
Answers: 1
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 05:00
Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.
Answers: 1
A 15lb bowling ball and a 10 pound bowling ball are
dropped from a 10m building. Which of the follo...
English, 20.02.2021 14:10
Mathematics, 20.02.2021 14:10
Spanish, 20.02.2021 14:10
Mathematics, 20.02.2021 14:10
Physics, 20.02.2021 14:10
History, 20.02.2021 14:10
Mathematics, 20.02.2021 14:10
Computers and Technology, 20.02.2021 14:10
Health, 20.02.2021 14:10
English, 20.02.2021 14:10
Mathematics, 20.02.2021 14:10
History, 20.02.2021 14:10
Mathematics, 20.02.2021 14:10