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A 1 m3 rocket-propellant chamber is tilled with combustion gases at 3000 K and 7 MPa at the instant combustion ceases. The throat area of the nozzle is 0.1 m2. Estimate the time it takes for the chamber pressure to drop to 0.7 MPa. Assume that at the instant combustion ceases, the chamber propellant supply stops completely, and also that gamma = 1.2 and M = 20.
a gas contained in a piston cylinder assembly undergoes a process from state 1 to state 2 defined by the following
two tanks containing air are connected via a valve. the first tank is 0.5 m3 and contains air at t 25 oc and p 500
the surface pressure of venus is about 90 bar and the surfacetemperature is ap-proximately 880 degrees f. the
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hemodialysis is a procedure that patients who have limited or virtually non-existent kidney function undergo to remove
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air enters a compressor operating at steady state with a pressure of 14.7lbfin2 and a volumetric flow rate of 8 ft3s.
the steady-state creep rates at 473 k for any alloy are 2.510-3 h-1 at 55 mpa and 2.410-2 h-1 at 69 mpa. the activation
1- find the decay constant of cesium-137 half-life 30.2 y then calculate the activity in becquerels and curies for a
Assume that viscous effects are negligible Plot this data using appropriate dimensionless groups
a 20-mm diameter rod made of a ductile material with a yield strength of 350 mpa is subjected to torque of 100 n.m and
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