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An inventor claims to have developed a device that executes a power cycle while operating between reservoirs at 500 and 300 K that has a thermal efficiency of (a) 45%, (b) 40%, (c) 35%. Evaluate the claim for each case.
four forces are applied to a W200x35.9 rolled beam as shown. determine the principal stresses and maximum shearing stress at point a.
water vapor enters a turbine operating at steady state at 30 mpa 600 oc and expands adiabatically to 6 mpa. if the
a household refrigerator that has a power input of 80w assume constant work input over time and a coefficient of
a well-insulated vertical piston-cylinder device contains air. the diameter of the piston is 8 inches. atmospheric
refrigerant 134a is the working fluid in a solar power plant operating on an ideal rankine cycle. saturated vapor x11.0
an individual weighs 150 lbf at sea level on earth. calculate the mass of the individual in lbm on earth. calculate
a dam across a river dams up a lake 300 m higher than the river downstream. the electric generators driven by
a house is maintained at 75degf in the winter by a heat pump. the house is losing heat at a rate of 60000 btuh through
a moving particle has coordinates in millimeter which vary with the time t in seconds according to r2t2-4ti 3t2 -t33j
a low quality-low pressure flow of saturated liquid-vapor mixture of water enters an insulated flash tank located in a
The boom OA carries a load P and is supported by two cables as shown. Knowing that the tension is 510 N in cable AB and 765 N in cable AC, determine the magnitude and direction of the resultant of the forces exerted at A by the two cables.
water is the working fluid in an ideal rankine cylce. saturated vapors enters the turbine at 16mpa and the condensor
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