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A double pipe heat exchanger has an effectiveness of 0.5 when the flow is counter current and the thermal capacity of one fluid is twice that of the other fluid. calculate the effectiveness of the heat exchanger if the direction of flow of one of the fluids is reversed with the same mass flow rates as before?
a fixed quantity of air at t1 57oc and p1 222 kpa is heated at constant temperature in a piston-cylinder assembly
a dam across a river dams up a lake 300 m higher than the river downstream. the electric generators driven by
the centerboard of a sailboat is 2.5m long and has a chord of 1m. approximate the centerboard as a flat plate in water
the composite beam is made of a-36 steel a bonded to c83400 red brass b and has the cross section shown. if it is
the power output of a steam turbine is 30 mw. determine the rate of steam flow in the turbine for saturated steam
a cantilevered steel pipe tower 80 m tall is being considered for a new wind turbine. the weight of the turbine is 3400
a state runs a lottery in which 6 numbers are randomly selected from 40 without replacement. a player chooses 6 numbers
in a hydroelectric power plant water enters the turbine nozzles at 880 kpa absolute with a negligible velocity. if the
the wear resistance of a steel shaft is to be improved by nitrogen hardening of its surface. the initial nitrogen
a 6 kg sphere moving at 3 ms collides with a 10 kg sphere traveling 2.5 ms in the same direction. the 6 kg sphere comes
the motion of the slender 10kg rod AB is guided by collars of negligible mass that slide freely on the vertical and horizontal rods. knowing that the bar is released from rest when θ=30, determine the velocity of the collars A and B when θ = 60.
the inclined-tube manometer has d 76 mm and d 8 mm and is filled with meriam red oil. compute the angle that will
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