Physics, 20.12.2019 05:31, krystlemiller11211
Aclosed, rigid tank contains 5 kg of air initially at 300 k, 1 bar. as illustrated in fig. p6.50, the tank is in contact with a thermal reservoir at 600 k and heat transfer occurs at the boundary where the temperature is 600 k. a stirring rod transfers 600 kj of energy to the air. the final temperature is 600 k. the air can be modeled as an ideal gas with cv= 0.733 kj/kg·k and kinetic and potential energy effects are negligible. determine the amount of entropy transferred into the air and the amount of entropy produced, each in kj/
Answers: 1
Physics, 22.06.2019 10:40, rainbowboi
As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
Physics, 22.06.2019 19:00, bradleycawley02
What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?
Answers: 3
Aclosed, rigid tank contains 5 kg of air initially at 300 k, 1 bar. as illustrated in fig. p6.50, th...
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