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An open-ended mixing drum is a thin cylinder of length 1.3 m, diameter 600 mm and wall thickness 5 mm. The drum is made from steel of density 7800 kg m 3 . A driving torque of 55 Nm accelerates the drum uniformly from rest to a speed of 3600 rpm against a friction torque of 5 Nm. Determine (a) the moment of inertia of the drum, (b) the angular acceleration, (c) the time taken, (d) the work done, (e) the average power developed by the driving motor.
a refrigerant 134a at 140 kpa and -10 degree celcius is compressed by an adiabatic 16kw compressor to an exit state of
Air is compressed at steady state from 1 bar, 300 K to 5 bar 500 K using 150 kW of power. The compressor produces 50 kW of heat that is transferred to the surroundings. Assuming an ideal gas determine the mass flow rate of the fluid.
A shell and tube heat exchanger with one shell pass and four tube passes is being analyzed to determine the heat transfer rate and the fluid outlet temperatures for prescribed flow rates and inlet temperatures. The cold fluid has a heat capacity rate..
water in a piston-cylinder initially starts at t 400of and p 200 psia. the piston is heated until it final volume is
A system consisting of 1kg of H2O undergoes a cycle composed of the following closed processes:
Gas is contained in a vertical piston-cylinder assembly. The initial volume of the gas is 0.1 m3 and the initial pressure is 500 kPa. The gas undergoes a quasi equilibrium expansion process to a final volume of 0.25 m3. For each case below, determine..
liquid waterh2o at 200 kpa and 20oc is heated in a chmaber by mixing it with a steam h20 at 200 kpa and 150oc. the
methane at 1 mpa 300 k is throttled through a valve to 100 kpa. assume no change in kinetic energy and ideal gas
an object whose mass is 50lb is projected upward from the surface of the earth with an intial velocity of 200 fts. the
Gaseous propane at 77 oF is mixed with air at 300oF and ignited. What percentage theoretical air must be used if the temperature of the products is 1700oF? Assume an adiabatic process.
in an ice-making plant water at 0degc is frozen at atmosphere pressure 333.7 kjkg of heat is removed from water per
a first class lever in static equilibrium has a 50lb resistance force and a 15lb effort force. the levers effort force is located 4ft from the fulcrum. what is the actual mechanical advantage of the system?
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