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1. An inventor claims to have developed a food freezer that at steady state requires a power input of 0.6 kW to extract energy by heat transfer at a rate of 3000 J/s from freezer contents at 270 K. Evaluate this claim for an ambient temperature of 293 K.
2. An inventor claims to have developed a refrigerator that at steady state requires a net power input of 0.7 horsepower to remove 12,000 Btu/h of energy by heat transfer from the freezer compartment at 08F and discharge energy by heat transfer to a kitchen at 708F. Evaluate this claim.
an elevated open stairway like the one in the sac is designed to be supported by four steel rods connecting the
Water flows steadily in a horizontal 125 mm diameter cast-iron pipe. The pipe is 150 m long and the pressure drop between the inlet and exit sections is 150 kPa. Find the volume flow rate through the pipe. Neglect entrance and exit losses.
a thin-walled closed-end cylindrical pressure vessel with spherical end caps is internally pressurized to 500 psi. if
a rigid chamber contains 100 kg of water at 500 kpa 100 c. a paddle wheel stirs the water at 1000 rpm with a torque of
to cool a summer home without using a vapor-compression refrigeration cycle air is routed through a plastic pipe k0.15
Two bosses in a plastic bezel must align with two mounting holes in a steel plate. The steel plate holes are 8 inches apart center to center. What should be the center to center distance of the core pins that make bosses of the plastic part?
Calculate the vertical height raised, the final angular velocity of the drum, the work done, the input torque to the driving motor and the average power developed.
body a has a mass of 50 kg while the mass of body b is 20 kg. a force f 500 n is applied to body a parallel to the
a square bar is made from 6061-t4 aluminum alloy. at 75 degrees f its length is 10.500 in. it is placed between rigid
At a section in a passage, the pressure is 150 kPa (abs), the temperature is 10 deg C, and the speed is 120 m/s. For isentropic flow of air, determine the Mach number at the point where the pressure is 50 kPa (abs). Sketch the passage shape.
An inventor claims to have developed a power cycle operating between hot and cold reservoirs at 1175K and 295K, respectively, that provides a steady state power output of (a) 28 kw, (b) 31.2 kW, while receiving energy by heat transfer from the hot re..
you are an industrial hygienist for a large distributor of industrial compressed gases who was evacuated to baton rouge
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