HW26 - Answer in units of J. Hot Reservoir Temperature...

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Create assignment, 57112, Homework 26, Sep 01 at 3:16 pm 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Covers 20.3-20.7 Temperature Increase 22:01, calculus, numeric, > 1 min, normal. 001 The e f ciency of a 1000 MW nuclear power plant is 33%. If a river of flow rate 1 × 10 6 kg / s were used to transport the excess thermal energy away, what would be the average temperature increase of the river? Answer in units of C. E f ciency of a Heat Engine 22:02, trigonometry, numeric, > 1 min, nor- mal. 002 A heat engine absorbs 360 J of thermal energy and performs 25 J of work in each cycle. Find the e f ciency of the engine. 003 Find the thermal energy expelled in each cy- cle. Answer in units of J. Carnot Thermal Energy 22:04, trigonometry, numeric, > 1 min, nor- mal. 004 A Carnot engine has a power output of 150 kW. The engine operates between two reservoirs at 20 C and 500 C. How much thermal energy is absorbed per hour? Answer in units of J. 005 How much thermal energy is lost per hour?
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Unformatted text preview: Answer in units of J. Hot Reservoir Temperature 22:04, trigonometry, numeric, > 1 min, nor-mal. 006 A Carnot engine has an e f ciency of 25 percent when the hot reservoir tempera-ture is 500 C. If we want to improve the e f ciency to 30 percent, what should be the temperature of the hot reservoir, assuming everything else remains unchanged? Answer in units of C. Refrigerator Performance 02 22:06, trigonometry, numeric, > 1 min, nor-mal. 007 A refrigerator has a coe f cient of performance equal to 5. If the refrigerator absorbs 120 J of thermal energy from a cold reservoir in each cycle, nd the work done in each cycle. Answer in units of J. 008 Find the thermal energy expelled to the hot reservoir. Answer in units of J. Answers: 001: 0.485022 C 002: 0.0694444 003: 335 J 004: 8.69625 x 10 8 J 005: 3.29625 x 10 8 J 006: 555.214 C 007: 24 J 008: 144 J 021: 9.94718 x 10-5 C/m 2 022: :-X...
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This note was uploaded on 11/12/2009 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas at Austin.

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HW26 - Answer in units of J. Hot Reservoir Temperature...

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