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A Carnot refrigerator is maintaining food stuffs in a refrigerated area at 2oC by rejecting heat to the atmosphere at 27oC. It is desired to maintain some frozen foods at -17oC with the same sink temperature at 27oC. What percent increase in work input will be required for the frozen food unit over the refrigerator unit for the same quantity of the QL removed?
at time t0 the postion vector of a particle moving in the x-y plane is r5i m. by time t 0.02 s its position vector has
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1 given nitrogen n2 gas within a piston-cylinder assembly undergoes a compression from p1 0.2 mpa v1 2.75 m3 to a
An engineer determines that a 40 cm long rod of 1020 grade steel will be subjected to a tension of 20 kN.
What is the packing density
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a refrigerator freezer compartment is maintained at a temperature of -15degf by removing heat at a rate of 4500 btuhr.
the angle with the vertical of a swinging simple pendulum obeys the equationtt 0.150 rad cos2.85 radst 1.66.what is
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a mass of 5 lbm is released when it is just in contact with a spring of stiffness 25 lbfft that is attached to the
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