CONCEPTUAL PHYSICS LL FD
12th Edition
ISBN: 9780135745816
Author: Hewitt
Publisher: PEARSON
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Chapter 18, Problem 50RCQ
Why does the bottom of a tire pump feel hot when you pump air in the tire, but when air is released, the valve stem feels cool?
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When you blow on the back of your hand with your mouth wide open, your breath feels warm. But if you partially close your mouth to form an “o” and then blow on your hand, your breath feels cool. Why?
A steel water pipe, of inside diameter 25 mm and outside diameter 30 mm, is
rigidly attached at two points along its length to a concrete wall. The force
exerted on the pipe by the fastenings is zero on a hot day, when both pipe and
wall are at 30°C. On a cold day, when the wall is at 10°C and the pipe has
been heated by water passing through it, the compressive force exerted on the
pipe is (30 kN.) Calculate the temperature of the pipe.
Assume that stresses due to the pipe do not affect the contraction of the wall.
Coefficient of linear expansion for concrete = 6.10 °C.
Coefficient of linear expansion for steel = 1,1.10-5 °C-1
Young's modulus for steel = 2.10" N.m².
Explain why the internal energy of the air increases as the tyre is inflated.
Chapter 18 Solutions
CONCEPTUAL PHYSICS LL FD
Ch. 18 - Prob. 1RCQCh. 18 - Prob. 2RCQCh. 18 - Prob. 3RCQCh. 18 - Prob. 4RCQCh. 18 - Prob. 5RCQCh. 18 - Prob. 6RCQCh. 18 - Prob. 7RCQCh. 18 - Prob. 8RCQCh. 18 - Prob. 9RCQCh. 18 - Prob. 10RCQ
Ch. 18 - Prob. 11RCQCh. 18 - Prob. 12RCQCh. 18 - Prob. 13RCQCh. 18 - Prob. 14RCQCh. 18 - Prob. 15RCQCh. 18 - Prob. 16RCQCh. 18 - Prob. 17RCQCh. 18 - Prob. 18RCQCh. 18 - Prob. 19RCQCh. 18 - Prob. 20RCQCh. 18 - Prob. 21RCQCh. 18 - Prob. 22RCQCh. 18 - Prob. 23RCQCh. 18 - Prob. 24RCQCh. 18 - Prob. 25RCQCh. 18 - Prob. 26RCQCh. 18 - Prob. 27RCQCh. 18 - Prob. 28RCQCh. 18 - Prob. 29RCQCh. 18 - What is the zeroth law of thermodynamics?Ch. 18 - Prob. 31RCQCh. 18 - Prob. 32RCQCh. 18 - Show that the ideal efficiency is 90% for an...Ch. 18 - 34. Calculate the ideal efficiency of an engine in...Ch. 18 - 35. What is the ideal efficiency of an automobile...Ch. 18 - Prob. 36RCQCh. 18 - 37. On a chilly 100C day, your friend who loves...Ch. 18 - 38. Imagine a giant dry-cleaner’s bag full of air...Ch. 18 - Wally Whacko claims to have invented a heat engine...Ch. 18 - 40. A power station with an efficiency of 0.4...Ch. 18 - 41. Consider a 6.0g steel nail 8.0cm long and a...Ch. 18 - Prob. 42RCQCh. 18 - Prob. 43RCQCh. 18 - Prob. 44RCQCh. 18 - Prob. 45RCQCh. 18 - Prob. 46RCQCh. 18 - 47. If you vigorously shake a can of chicken broth...Ch. 18 - Prob. 48RCQCh. 18 - 49. Suppose you do 100J of work in compressing a...Ch. 18 - Why does the bottom of a tire pump feel hot when...Ch. 18 - Prob. 51RCQCh. 18 - Prob. 52RCQCh. 18 - Prob. 53RCQCh. 18 - What is the ultimate source of energy in coal,...Ch. 18 - Prob. 55RCQCh. 18 - Prob. 56RCQCh. 18 - Prob. 57RCQCh. 18 - 58. What happens to the efficiency of a heat...Ch. 18 - Prob. 59RCQCh. 18 - Prob. 60RCQCh. 18 - Prob. 61RCQCh. 18 - Prob. 62RCQCh. 18 - Prob. 63RCQCh. 18 - Prob. 64RCQCh. 18 - 65. A refrigerator moves heat from cold to warm....Ch. 18 - 66. What happens to the density of a quantity of...Ch. 18 - Prob. 67RCQCh. 18 - In buildings that are being electrically heated,...Ch. 18 - Prob. 69RCQCh. 18 - Prob. 70RCQCh. 18 - Prob. 71RCQCh. 18 - Prob. 72RCQCh. 18 - Prob. 73RCQCh. 18 - The ocean possesses enormous numbers of molecules,...Ch. 18 - Prob. 75RCQCh. 18 - Prob. 76RCQCh. 18 - Prob. 77RCQCh. 18 - Prob. 78RCQCh. 18 - Prob. 79RCQCh. 18 - Prob. 80RCQCh. 18 - Prob. 81RCQCh. 18 - Prob. 82RCQCh. 18 - Prob. 83RCQCh. 18 - Prob. 84RCQCh. 18 - 85. The temperature in Boston was 400F when it was...Ch. 18 - Prob. 86RCQCh. 18 - Prob. 87RCQCh. 18 - Prob. 88RCQCh. 18 - Prob. 89RCQCh. 18 - Prob. 90RCQCh. 18 - Prob. 91RCQCh. 18 - Prob. 92RCQCh. 18 - Prob. 93RCQ
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