Mathematics
Mathematics, 26.06.2019 14:10, thisismyusername875

John owns an engine which receives heat input from a reservoir at 600 k and loses heat to a sink at 300 k. what is the maximum possible efficiency of this engine? a. 25 percent b. 50 percent c. 75 percent d. 100 percent

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Engineering, 29.07.2019 23:20, hdbug2025
Acarnot engine is operated between two heat reservoirs at temperatures of 520 k and 300 k. it receives heat from the 520 k reservoir and discards heat to the 300 k reservoir in each cycle. what is the thermal efficiency of the engine?
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Engineering, 13.09.2019 23:30, llamawrench7366
Aheat engine receives heat from a heat source at 1453 c and has a thermal efficiency of 43 percent. the heat engine does maximum work equal to 539 kj. determine: a) the heat supplied to the heat engine by the heat source (kj), b) the heat rejected to the heat sink (kj), and c) the temperature of the heat sink (c).
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Physics, 05.10.2019 09:10, Cassandoo
1. a heat engine has a thermal effeciency of 0.38. during each cycle, it absorbs 720 j of heat from a high temperature reservoir. how much waste heat does it discard each cycle? 380 j 130 j 510 j 450 j 2. a heat engine receives 1210 j of heat and exhausts 820 j per cycle of the engine. what net work does the engine perform during the cycle? 2030 j 660 j 390 j 820 j 3. a heat engine of efficiency 0.52 performs 780 j of useful work per cycle.what is the heat input per cycle? 410 j 330 j 1200 j 1500 j 4. during each cycle of its operation, an air conditioner transfers 930 kj of heat from a room and outputs 1730 kj of heat to the outdoors. what mechanical work is involved per cycle? 2660 kj of work performed by the air conditioner 800 kj of work performed by the air conditioner 800 kj of work performed on the air conditioner 2660 kj of work performed on the air conditioner 5. a heat engine has an effeciency of 0.48. initially, the heat input to the engine is qh. then the heat input is increased by a factor of 2.4. by what factor does the net work w change? 2.4 0.42 5.8 1 6. a heat engine takes in 840 kj per cycle from a heat reservoir. which is not a possible value of the engine's heat output per cycle? 0 kj 150 kj 830 kj 400 kj
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