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A diesel engine performs 2200 $\mathrm{J}$ of mechanical work anddiscards 4300 $\mathrm{J}$ of heat each cycle. (a) How much heat must besupplied to the engine in each cycle? (b) What is the thermalefficiency of the engine?
(a) $Q_{H}=6500 \mathrm{J}$(b) $e=34 \%$
Physics 101 Mechanics
Chapter 16
The Second Law of Thermodynamics
Temperature and Heat
Thermal Properties of Matter
The First Law of Thermodynamics
Cornell University
University of Sheffield
University of Winnipeg
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we're told that diesel engine for performs 2200 tools of mechanical work and discards 4300 jewels of heat cycle. How much heat must be supplied to the engine in the cycle? Okay, so the workout is 2200 jewels. The heat out is 4300 jewels. So the heat and has to be the workout plus the heat out and that iss 6500 jewels. So the efficiency is the workout provided by the heat in. So that's 2200 jewels divided by 6500 tools, and we get 0.130 point 34 or 34%.
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