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A refrigerator operates on the ideal vapor compression refrigeration cycle with R-134a as the working fluid between the pressure limits of 120 kPa and 800 kPa. If the rate of heat removal from the refrigerated space is 38 kJ/s, Find the mass flow rate of the refrigerant
the uniform slender bar abc weighs 6 lb and is intially at rest with end a bearing against the stop in the horizontal
A body moves through standard air at 200 m/s. What is the stagnation pressure on the body? Assume (a) compressible flow and (b) incompressible flow.
steam flowing in a supply line at 2000 kpa is throttled through a valve to 100 kpa and 120 deg c. determine the
a steam power plant operates on a simple ideal rankine cycle between the pressure limits of 3mpa and 50kpa. the
Consider a 70-kg woman who has a total foot imprint area of 400 cm2. She wishes to walk on the snow, but the snow cannot withstand pressures greater than 0.5 kPa. Determine the minimum size of the snow shoes needed.
a race car that weighs 2740 lb is on a circular portion of a track with a radius of r310 ft. the race car is traveling
A compressor operating adiabatically is to compress 2.83 m^3/min of air at 29.4C and 102.7 kN/m^2 to 311.6kN/m^2. Calculate the power required if the efficiency of the compressor is 75%. Also, calculate the outlet temperature.
when the rubber bands of the sling shot are pulled back each rubber band is stretched 3 in. the natural length and the
the work on a system with a mass 100 lbm is known to be 10 btus. if there is no change in potential energy and the
an alternation copolymer is known to have a number-average molecular weight of 200000nbspand a degree of polymerization
a piston held by a pin in an insulated cylinder shown in figure above right contains 2 kg water at 100c quality 98. the
the 20 kg mass is released from the position shown and falls on the linear spring k 30000 nm. use conservation of
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