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Water is heated by air in a heat exchanger. The water enters at 150 C and 0.2 MPa and leaves at 300 C and 0.2 MPa. The mass flow rate of the water is 1 kg/s. The air enters at 350 C and 0.1 MPa at a rate of 2 kg/s. Determine the heat transfer rate between the two fluids (kW) and the exit temperature (C) of the air.
a sky diver jumps from a helicopter and is falling straight down at 30 ms when his parachute opens. from then on his
a vertical piston-cylinder device initially contains 0.25 m3 of air at 600 kpa and 300degc. a valve connected to the
a stream of saturated liquid water at 25u25e6c is added to a 3kgs stream of steam with a pressure of 5 bar and a
when it is unloaded the non-prismatic bar is 12 in. long. the loads cause axial strain given by the equation
Use thin airfoil theory to show that the pressure coefficient across the length of the ellipse in the stream-wise direction is constant when it is assumed T
the wheel roles without slipping such that at the instant shown it has an angular velocity and angular acceleration.
using the fact that the tension in the rope must remain constant in all sections of the rope calculate the total force
a 75-lb stoplight is suspended between two poles as shown in fignbspp3-27. neglect the weight of the flexible cables
a scuba divers 2 ft3 air tank is to be filled with air from a compressed air line at 120 psia and 100 degree f.
Now suppose the mean time to failure (mf) on the expose machine is 60 hours and the repair time is exponentially distributed with a mean of 2 hours (mr). What are the effective mean and CV of the process time for a job of 60 panels?
an inventor claims to have developed a refrigerator that requires a net power input of 0.7 hp to remove 12000 btuh of
a truck traveling at vo 60mph when the driver applies the brakes to come to stop the deceleration of the truck is
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