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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- You are hired to build a geothermal power plant that absorbs heat from a hot water spring and discards heat into the surrounding air, which is at a temperature of 17°. The plant is designed for a maximum (Carnot) efficiency of 0.21. What is the temperature, in degrees Celsius, of the hot water gushing from the spring? If the rate of energy supplied to the plant by the hot-water source is 4.6 kW, what is the plant’s maximum rate of power output, in kilowatts?arrow_forwardIn one cycle a heat engine absorbs 460 J from a high-temperature reservoir and expels 310 J to a low-temperature reservoir. If the efficiency of this engine is 55% of the efficiency of a Carnot engine, what is the ratio of the low temperature to the high temperature in the Carnot engine? Tlow/ Thigh = ?arrow_forwardWhat is the Carnot efficiency (in percent) of a heat engine operating between the temperatures of 395°C (668 K) and 170°C (443 K)?arrow_forward
- Problem 5: Suppose a Carnot engine has an efficiency of 45 % and a cold reservoir temperature of 28.5°C. Part (a) What is the hot reservoir temperature, in degrees Celsius, of this Carnot engine? Part (b) What must the hot reservoir temperature be, in degrees Celsius, for a real heat engine that has an efficiency of 45, which is 70% of the maximum efficiency? Assume it has the same cold reservoir, at 28.5°C.arrow_forwardSteam locomotives have an efficiency of 15.0% and operate with a hot steam temperature of 425°C. (a) What would the cold reservoir temperature (in °C) be if this were a Carnot engine? °C (b) What would the maximum efficiency of this steam engine be if its cold reservoir temperature were 150°C? %arrow_forwardWhat is the Carnot efficiency (in percent) of a heat engine operating between the temperatures of 360°C (633 K) and 200°C (473 K)?arrow_forward
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