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Two refrigerators are arranged in series. One of them receives 300 kJ/cycle from a reservoir at 300 K. The heat rejection from this refrigerator serves as the heat input to the second refrigerator which delivers 1000 kJ/cycle of heat output to a reservoir at 1000 K. The two refrigerators have the same coefficients of performance. (a) Determine the heat exchange between the first to the second cycle (kJ/cycle) that occurs at the intermediate temperature. (b) What is the coefficient of performance of each refrigerator? (c) Compute the work required (kJ/cycle) to operate each refrigerator.
on the first day of the fiscal year harris company borrowed 65000 by giving a 10-year 6 installment note to cuba bank.
when environmental crews started cleaning up a closed government wwii laboratory they discovered thousands of unlabeled
a parallel-plate capacitor is to be constructed by using as a dielectric rubber with a dielectric constant of 3.20 and
paget inc. has a target debt?equity ratio of 1.25. its wacc is 9.2 percent and the tax rate is 35 percent.a. if the
a point charge 4.20 uc is held fixed at the origin. a second point charge 1.60uc with mass of 2.80times10-4kg is placed
organic life co. is an hmo for businesses in the portland area. the following account balances appear on the balance
dear sirmadam ltbrgt ltbrgtplease find the enclosed file question paper. kindly send me answer sheet asap. ltbrgt
a flat plate solar collector 6 ft by 12 ft is mounted on the roof of a house. the outer surface of the collector is at
nitrogen at 100c and 600 kpa expands in such a way that it can be approximated by a polytropic process with n 1.2.
kendrick corporation was organized on january 2 2011. during 2011 kendrick issued 20000 shares at 24 per share
calculate the enthalpy change of the universe during the process. Cp=Cv = 4.18 kj/kgK
Consider a NACA 0009 airfoil that has a plain flap whose length is 0.2c and which is deflected 25. a. Calculate cl and cmc/4 When the geometric angle of attack is 4 degrees, what is the section lift coefficient? Where is the center of pressure?
a 100-pound sign is supported at the midpoint of a cable stretched between anchor points that are separated by 86 feet.
a 60 g bullet moving with a speed of 500 ms strikes a 5 kg block moving in the same direction with a speed of 30 ms. if
water is the working fluid in a vapor power cycle with superheat and reheat. superheated vapor enters the first turbine
Calculate the static thrusts of the rocket and turbojet engine described in the figure. The thrust T is the force necessary to prevent horizontal movement of the engine. Both engines exhaust a mass flow of 40 kg/s.
steam enters the first turbine stage of a vapor power cycle with reheat and regeneration at 32 mpa 600degc and expands
a solid circular bar of aluminium fits inside a tube of copper with outside diameter of 50mm amp 45mm as inside
A piston-cylinder device contains 0.005 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 600 kPa. Heat is transferred at constant pressure until the temperature reaches 200°C.
what happens if a positive edge dislocation meets a negative edge dislocation on the same slip plane with a parallel
determine the time it takes for the ball to start rolling without slip and its speed when it does so. In addition, determine the distance it travels before it starts rolling without slip. Assume (mu)K = 0.10.
liquid water at 50degc and 1 mpa is mixed with superheated steam at 200degc and 1 mpa in an open feedwater heater
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