Physics, 26.09.2019 09:30 elijahjacksonrp6z2o7
Plz . you push a 67-kg box across a floor where the coefficient of kinetic fiction is uk=0.55. the force you exert is horizontal. a. how much power is needed to push the box at a speed of 0.50m/s and b. how much work do you do if you push the box for 35sec? explicit work shown w/ explanation
Answers: 1
Physics, 23.06.2019 07:00, laylaaaaah1603
I) a gas contained within a piston-cylinder assembly undergoes two processes, a and b, between the same end states, 1 and 2, where p1 = 10 bar, v1 = 0.1 m3 , u1 = 400 kj and p2 = 1 bar, v2 = 1.0 m3 , u2 = 200 kj: ' process a: process from 1 to 2 during which the pressure-volume relation is pv = constant. ' process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to state 2. kinetic and potential energy effects can be ignored. for each of the processes a and b, a) sketch the process on a p-v diagram. b) evaluate the work, in kj. c) evaluate the heat transfer, in kj.(ans : qb,12 = -65.0 kj)
Answers: 3
Plz . you push a 67-kg box across a floor where the coefficient of kinetic fiction is uk=0.55. the f...
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