Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 19, Problem 87P
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The proof that
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How much heat QH does a heat pump with a coefficient of performance of 2.00 deliver when supplied with 4.10 kJ
of electricity?
Он
J
Calculate the net work output of a heat engine following path ABCDA in the figure below, where V₁ = 10.6 × 10-³ m³ and
V/₂ = 42.4 x 10-³3 m³.
How is the work done measured for an enclosed loop in the case of a heat engine? J
P (106 N/m²)
2.6
2.0
1.0
0.6
!₁
I
I
A
D
V₁
V (10-³ m³)
I
B
V₂
Calculate the net work output (in J) of a heat engine following path ABCDA in the figure, where
V1 = 1.5 ✕ 10−3 m3
and
V2 = 6.0 ✕ 10−3 m3.
Chapter 19 Solutions
Physics for Scientists and Engineers
Ch. 19 - Prob. 1PCh. 19 - Prob. 2PCh. 19 - Prob. 3PCh. 19 - Prob. 4PCh. 19 - Prob. 5PCh. 19 - Prob. 6PCh. 19 - Prob. 7PCh. 19 - Prob. 8PCh. 19 - Prob. 9PCh. 19 - Prob. 10P
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- A Carnot engine is used to measure the temperature of a heat reservoir. The engine operates between the heat reservoir and a reservoir consisting of water at its triple point. (a) If 400 J per cycle are removed from the heat reservoir while 200 J per cycle are deposited in the triple-point reservoir, what is the temperature of the heat reservoir? (b) If 400 J per cycle are removed from the triple-point reservoir while 200 J per cycle are deposited in the heat reservoir, what is the temperature of the heat reservoir?arrow_forwardQs b and carrow_forwardWith 2.56 × 106 J of heat transfer into this engine, a given cyclical heat engine can do only 1.50 × 105 J of work. (a) What is the engine’s efficiency? (b) How much heat transfer to the environment takes place?arrow_forward
- An ideal refrigerator does 150 J of work to remove 560 J as heat from its cold compartment. (a) What is the refrigerator’s coefficient of performance? (b) How much heat per cycle is exhausted to the kitchen?arrow_forwardOne of the most efficient engines ever built is a coal-fired steam turbine engine in the Ohio River valley, driving an electric generator as it operates between 1,870°C and 430°C. (a) What is its maximum theoretical efficiency? (b) Its actual efficiency is 42.0%. How much mechanical power does the engine deliver if it absorbs 1.30 x 10° J of energy each second from the hot reservoir? kW Need Help? Read Itarrow_forwardWhile doing exercise at a temperature of T = 37∘C, an athlete loses m = 0.50 kg of water per hour by the evaporation of perspiration from her skin. Estimate the change in entropy △S of the water as it evaporates. The latent heat of evaporation of perspiration is Lv = 24.2 x 105 J/kg. Recall that evaporation is a form of vaporization that does not rely on the process of boiling at 100∘C.arrow_forward
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