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TB_chapter1 - COLLEGE PHYSICS TEST BANKS

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Chapter 1, Introduction C HAPTER 1 Conceptual Problems C1. A room in a house has a floor area of 120 ft 2 . Which of the following is most likely the approximate volume of the room? a. 3 m 3 b. 30 m 3 c. 300 m 3 d. 3 000 m 3 C2. When SI units are plugged into an equation, it is found that the units balance. Which of the following can we expect to be true for this equation? C3. How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude. a. about a decade b. about a century c. about a thousand years d. since Aristotle C4. Consider the sine of any angle between 30 ° and 40 ° . If the angle were doubled, what would happen to the sine of the angle? C5. There are other ways of expressing uncertainty besides significant figures. For example, suppose a quantity is known to have a value between 20.4 and 20.0 and our best estimate of the value is midrange at 20.2. We could write the number as 20.2 +/- 0.2 and say that the number has a 1% uncertainty. We would also say it has 3 significant figures. If we square a number with 1% uncertainty (i.e., 2 parts in about 200) and 3 significant figures, what results? 1
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Chapter 1, Introduction 1.1 Standards of Length, Mass, and Time 1. Since 1983 the standard meter has been defined in terms of which of the following? a. specific alloy bar housed at Sevres, France b. wavelength of light emitted by krypton-86 c. distance from the Earth’s equator to the North Pole d. the distance light travels in a certain fraction of a second 2. Since 1967 the standard definition for the second has been based on which of the following?
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