University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 20, Problem 20.33P
CP An ideal Carnot engine operates between 500°C and 100°C with a heat input of 250 J per cycle. (a) How much heat is delivered to the cold reservoir in cach cycle? (b) What minimum number of cycles is necessary for the engine to lift a 500-kg rock through a height of 100 m?
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An ideal Carnot engine operates between 500 C and 100 C with a heat input of 250 J per cycle. (a) How much heat is delivered to the cold reservoir in each cycle? (b) What minimum number of cycles is necessary for the engine to lift a 500 kg rock through a height of 100 m?
As a budding mechanical engineer, you are called upon todesign a Carnot engine that has 2.00 mol of a monatomic ideal gas asits working substance and operates from a high-temperature reservoir at500 C. The engine is to lift a 15.0 kg weight 2.00 m per cycle, using 500 Jof heat input. The gas in the engine chamber can have a minimum volumeof 5.00 L during the cycle. What is the thermal efficiency of the engine?
Temperatures:
(A) (in W)
An internal combustion engine may be described
approximately as a cyclic heat engine, in which the working
gas undergoes an Otto cycle. Assume (i) the engine
speed is 10 strokes per second; (ii) the engine absorbs
heat Qh and emits heat Qc for each cycle. (A) What is
the power supplied as work? (B) What is the efficiency?
Qh=640 joules; Qc = 455 joules.
OA: 1275.9 OB: 1850.0 OC: 2682.5 OD: 3889.6 OE: 5640.0 OF: 8177.9 OG: 11858.0 OH: 17194.1
(B)
OA: 0.096 OB: 0.113 OC: 0.132 OD: 0.154 OE: 0.180 OF: 0.211 OG: 0.247 OH: 0.289
Chapter 20 Solutions
University Physics (14th Edition)
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