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Question: Air at an initial temperature of 45°C is to be transported through a 50-m-long, well-insulated pipe. If the mean friction factor in the pipe can be assumed to be 0.025, find the minimum pipe diameter that can be used to carry the flow without choking occurring if the inlet air velocity is 50, 100, and 400 m/s.
a flat-bottomed barge 25 m long and 10 m wide submerged to a depth of 1.5 m is to be pushed up a river at a rate of 8.6
Determine the internal energy of this system as a function of β, H, and N by emplying an ensemble characterized by these variables.
r-134a is throttled from 1200kpa and 40oc to 200kpa. it is known that heat of 5kjkg is lost from r-134a to the
A practical integrator. Note that the resistor in parallel with the feedback capacitor provides a path for the capacitor to discharge the DC voltage. Usually, the time constant RF CF is chosen to be long enough not to interfere with the integration..
Compute estimates of x(2) using the second order Adams-Bash forth scheme (using the second-order predictor-corrector to start the computation) with step sizes h = 0.2 and 0.1.
a commercial heat pump has energy in to the system at a rate of 60 kw from a thermal reservoir. ifnbspthe power input
a piston-cylinder contains 0.8 kg of nitrogen initially at 100 kpa and 27 degrees. the nitrogen is compressed slowly in
a 20 cm diameter sphere is made of a heat-generating material that produces 106 wm3. the sphere is cooled by 20oc air
a 1 kg block of copper at 350degc is quenched in a 10 kg oil bath initially at ambient temperature of 20degc. calculate
a closed system undergoes a cycle consisting of two processes. during the first process 40 btu of heat is transferred
given that the instantaneous voltage across a capacitor isvc401-e-tcrvoltswhen being chargerd by a 40 volt dc supply
steam enters a heat exchanger operating at steady state at 0.1 mpa and 100 degrees c and exits at the same pressure as
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