Engineering, 21.11.2019 04:31 bigboy43
At time t0 (relative to perigee passage), a spacecraft has the following orbital parameters: % e = 1.5; perigee altitude = 300 km; i = 35 °; ω = 130 °; and ω = 115 °.% calculate r and v at perigee relative to a) the perifocal reference% frame. b) the geocentric equatorial frame.
Answers: 3
Engineering, 03.07.2019 15:10
Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
Answers: 1
Engineering, 04.07.2019 18:10
Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.
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Engineering, 06.07.2019 02:30
A75mm diameter shaft is supported in a journal bearing 75mm long with a diametral clearance of 0. 1mm. it supports a radial load of 1000 n and is lubricated with sae 50 oil at 70°c. find the friction torque and the power loss when the crankshaft rotates at 2900 rev/min.
Answers: 1
Engineering, 06.07.2019 02:30
Precipitation hardening can be achieved in many light alloys by a three-step heat treatment. what is carried out and what is the purpose at each step? why is such a treatment necessary based on the nucleation and growth theory of phase transformation. compare this treatment with tempering martensite for carbon steels (similarities and differences).
Answers: 1
At time t0 (relative to perigee passage), a spacecraft has the following orbital parameters: % e = 1...
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