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A motor has a disk mounted on its shaft. The disk has a diameter of 1 foot and weighs 60 pounds. Starting from rest, the motor rotates at 350 rpm after 5 seconds. If the motor has a 92% efficiency, determine the input power in watts.
a water stream is heated in fully developed flow through a pipe with uniform heat flux at the wall. the flow rate is
a cylinderpiston contains carbon dioxide at 1 mpa 300oc with a volume of 200 l. the total external force acting on the
two kilograms of saturated water vapor at 600 kpa are contained in a piston-cylinder device. the water expands
An adiabatic piston cylinder contains 1 kg of R-134a. Initially the conditions inside the piston are 200 kPa and 0 degrees C. An electric heater inside the device runs with constant voltage of 110 V and a constant 0.1A of current for one hour.
two blocks a and b of mass 8 kg and 12 kg respectively hang from a cable which passes over a pulley of negligible mass.
a centrifugal compressor delivers 20 kgs of air at 0.32 mnm2 when running at 17500 rpm and absorbing 2800 kw. the inlet
the upper surface of a 50-cm thick solid plate k237 wmk is being cooled by water with temperature of 20 degrees
a lear jet flying at 150 kcas assume no errors due to compressibility so lets assume 150 keas at sea level on a
a 5 cm orifice meter is being used to measure the flowrate of 70 degree c water. the mercury manometer shows a height
Define your system to be the gas in the cylinder, and calculate the work transferred from the surroundings to the system from this expansion. Note that the pressure will change as the expansion takes place.
a study is to be made using liquid ammonia as the fuel in a gas-turbine engine. consider the compression and combustion
The top of a car has an area of 4 m2 and is at a temperature of 40 C. It’s speed is 40 mph. At what rate will it lose heat to surrounding air at 10 C if heat transfer coefficient is 400 W/m2C?
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