Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Textbook Question
Chapter 22, Problem 32A
Turn an incandescent lamp on and off quickly while you are standing near it. You feel its heat, but you find when you touch the bulb that it is not hot. Explain why you felt heat from the lamp.
Expert Solution & Answer
To determine
To explain: The reason due to which the heat from an incandescent lamp is felt when turned on and off quickly but when touched, the bulb is not hot.
Explanation of Solution
Introduction:
The transmission of heat energy in the form of electromagnetic waves is called radiation.
The bulb transfers heat through the process of radiation when turned on. Hence, heat is felt. But, the lamp is turned off quickly. So, it does not get enough time to absorb heat. Hence, when touched, it appears cool.
Conclusion:
The incandescent lamp transfers heat energy through radiation but does not become hot itself as it is turned off quickly.
Chapter 22 Solutions
Conceptual Physics: The High School Physics Program
Ch. 22 - What is the role of 'loose' electrons in heat...Ch. 22 - Why does a piece of room-temperature metal feel...Ch. 22 - What is the difference between a conductor and an...Ch. 22 - Why are materials such as wood, fur, feathers, and...Ch. 22 - Prob. 5ACh. 22 - How does Archimedes' principle relate to...Ch. 22 - Why does the direction of coastal winds change...Ch. 22 - How does the temperature of a gas change when it...Ch. 22 - Prob. 9ACh. 22 - What is radiant energy?
Ch. 22 - How does the predominant frequency of radiant...Ch. 22 - Is a good absorber of radiation a good emitter or...Ch. 22 - Which will normally cool faster, a black pot of...Ch. 22 - Why does a good absorber of radiant energy appear...Ch. 22 - Prob. 15ACh. 22 - Which will undergo the greater rate of cooling, a...Ch. 22 - Does Newtons law of cooling apply to warming as...Ch. 22 - What is terrestrial radiation?Ch. 22 - Solar radiant energy is composed of short waves,...Ch. 22 - Prob. 20ACh. 22 - At what common temperature will both a block of...Ch. 22 - If you stick a metal rod in a snowbank, the end in...Ch. 22 - Wood is a better insulator than glass. Yet...Ch. 22 - Visit a snow-covered cemetery and note that the...Ch. 22 - Wood is a poor conductor, which means that heat is...Ch. 22 - When a space shuttle is in orbit and there appears...Ch. 22 - A friend says that, in a mixture of gases in...Ch. 22 - A friend says that, in a mixture of gases in...Ch. 22 - In a mixture of hydrogen and oxygen gases at the...Ch. 22 - Which atoms have the greater average speed in a...Ch. 22 - Notice that a desk lamp often has small holes near...Ch. 22 - Turn an incandescent lamp on and off quickly while...Ch. 22 - In Montana, the state highway department spreads...Ch. 22 - Suppose that a person at a restaurant is served...Ch. 22 - Will a can of beverage cool just as fast in the...Ch. 22 - Prob. 36ACh. 22 - If you wish to save fuel on a cold day, and you're...Ch. 22 - Why is whitewash sometimes applied to the glass of...Ch. 22 - If the composition of the upper atmosphere were...Ch. 22 - An automobile cooling system holds 12 liters of...Ch. 22 - Prob. 41ACh. 22 - Decay of radioactive isotopes of thorium and...Ch. 22 - In a lab you burn a 0.6-g peanut beneath 50 g of...Ch. 22 - Pounding a nail into wood makes the nail warmer....Ch. 22 - At a certain location, the solar power per unit...Ch. 22 - Hold the bottom end of a test tube full of cold...Ch. 22 - If you live where there is snow, do as Benjamin...Ch. 22 - Wrap a piece of paper around a thick metal bar and...
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