costs Tom and Jerry are each trying to sell you a heat engine. Both engines work between high and low temperature reservoirs of 975 K and 375 K, respectively. Tom's engine sells for $500 and he claims that with an input of 375 kJ into the engine, the engine will produce 225 kJ. Jerry's engine $350 and he claims that with an input of 375 kJ, the heat engine between the same two thermal reservoirs. Which heat engine justify your answer. will produce you 250 kJ of work purchase? You must should

costs Tom and Jerry are each trying to sell you a heat engine. Both engines work between high and low temperature reservoirs of 975 K and 375 K, respectively. Tom's engine sells for $500 and he claims that with an input of 375 kJ into the engine, the engine will produce 225 kJ. Jerry's engine $350 and he claims that with an input of 375 kJ, the heat engine between the same two thermal reservoirs. Which heat engine justify your answer. will produce you 250 kJ of work purchase? You must should

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Similar questions

A household refrigerator draws 113.9 W of electricity in order to keep its refrigerated compartment at a steady 4.7 ºC; the insulation of the compartment is such that heat passes from the room to the refrigerated compartment at 53.9 kJ per minute. Rejected heat is dumped to the room in which the refrigerator is placed. By comparison to the coefficient of performance for an ideal refrigerator, determine the maximum room temperature in which the refrigerator could operate. Give your answer in ºC to 1 decimal place.
A Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when the average outdoor temperature remains at about 2°C, the house is estimatedto lose heat at a rate of 55 000 kJ/h. If the heat pump consumes 4.8 kW of power while operating, determine: (a). how long the heat pump ran on that day(b). The total heating costs, assuming an average price of R 2.35/kWh for electricity, and(c). The heating cost for the same day if resistance heating is used instead of a heat pump.
The interior of a refrigerator has a surface area of 6.2 m2 . It is insulated by a 2 cm thick material that has a thermal conductivity of 0.0199 J/m · s · ◦ C. The ratio of the heat extracted from the interior to the work done by the motor is 5.5 % of the theoretical maximum. The temperature of the room is 27.6 ◦C, and the temperature inside the refrigerator is 6.6 ◦C. Determine the power required to run the compressor. Answer in units of W.
Q3/ A Carnot heat engine receives 655 kJ of heat from a source of unknown temperature and rejects 245 kJ of it to a sink at 22°C. Determine (a) the temperature of the source and (b) the thermal efficiency of the heat engine.
A heat engine receives heat from a heat source at 1200°C and has a thermal efficency of 40 percent. The heat engine does maximum work equal to 500 kJ. Determine the heat supplied to the heat engine by the heat source, the heat rejected to the heat sink, and the tmeperature of the heat sink.
An air-conditioning system is used to maintain a house at 70°F when the temperature outside is 100°F. The house is gaining heat through the walls and the windows at a rate of 800 Btu/min, and the heat generation rate within the house from people, lights, and appliances amounts to 100 Btu/min. Determine the minimum power input required for this airconditioning system.
An inventor claims to have developed a resistance heater that supplies 1.2 kWh of energy to a room for each kWh of electricity it consumes. Is this a reasonable claim, or has the inventor developed a perpetual-motion machine? Explain.
Calculate the net work output of a heat engine following path ABCDA in the figure below, where V1 = 2.6 ✕ 10−3 m3 and V2 = 10.4 ✕ 10−3 m3. J
A scientist claims to have developed a heat engine with 70% thermal efficiency when operating with thermal energy reservoirs at 700 K and 275 K. Is this claim valid? Please explain.
It has been suggested that a heat engine could be developedthat made use of the temperature difference between waterat the surface of the ocean and water several hundredmeters deep. In the tropics, the temperatures may be 27°Cand 4°C, respectively. (a) What is the maximum efficiencysuch an engine could have? (b) Why might such an enginebe feasible in spite of the low efficiency? (c) Can you imagineany adverse environmental effects that might occur?
A heat engine receives a heat-transfer at the rate of 2 MW at a high temperature of 750 °C. The engine releases energy to its surrounding at 300 K and work is produced at a rate of 1200 kW. What are 1. The energy released to the ambient surroundings? 2. The efficiency of the engine?
The heat engine shown receives 1.2 MW heat from a high temperature source at 500 C and rejects heat to the surroundings at 25 C. The output power from the engine is 550 kW. Find1- The amount of heat dissipated to the surroundings2- The heat engine efficiency3- Compare your answers above to a Carnot heat engine operating between the same two reservoirs