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A heat pump has a second law efficiency of of 74%. It supplies heat to a room at a rate of 46,000 Btu/hr in order to maintain the temperature at 70 degrees F. The environment is at a temp of -10 degrees F. Determine power required to drive the compressor.
hot water from a thermal spring is proposed as the heat source for a power cycle. if water is available at 95 c and a
lf the 50-kg crate starts from rest and achieves a velocity of v 4 ms when it travels a distance of 5 m to the right
a piston-cylinder with a volume of 0.5 m3 holds 1 kg of nitrogen at a temperature of 261 k. heat transfer to the
Motor coming to rest, A motor is running at 12 rpm and the switch is flipped and cuts the power. The rotor weighs 75 lbs.
, determine the speed of the boy at the instant = 4 . Neglect the size of the limb. When = 0, = 8 so that and are coincident, i. e., the rope is 16 long.
what is the specific heat of air in US customary units given that its value in SI units is approximately 1 kN.m/kg.K?
a scuba divers 2 cubic foot air tank is to be filled with air from a compressed air line at 120 psia and 100 degrees f.
a bank uses a certain form at a uniform rate of 60 pads per week during each of the 52 weeks per year it is in
block a is released from rest and slides down the frictionless ramp to the loop. the maximum height h of the loop is
Calculate the deflection of the simply supported beam at the center. The material is A36 steel and calculate the deflection of the simply supported beam at the center. The material is A36 steel and the beam is ten feet long.
show that the circumferential strain measured by a transverse gage on a round bar is the same as the radial strain.
a piston cylinder device contains 1 kg of liquid water at 200kpa and 25 deg c. heat is added to the water in the
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