Engineering, 23.11.2019 05:31 katie713518
Apower cycle receives energy qh by heat transfer from a hot reservoir at th 5 12008r and rejects energy qc by heat transfer to a cold reservoir at tc 5 4008r. for each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible.
(a) qh 5 900 btu, wcycle 5 450 btu
(b) qh 5 900 btu, qc 5 300 btu
(c) wcycle 5 600 btu, qc 5 400 btu
(d) thermo efficiency = 70%
Answers: 3
Engineering, 04.07.2019 18:10, niicoleassssssf
Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86
Answers: 2
Engineering, 04.07.2019 18:10, DestyHilBan1183
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:10, bckyanne3
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Apower cycle receives energy qh by heat transfer from a hot reservoir at th 5 12008r and rejects ene...
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