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Which of the following accurately describes the Doppler effect? a. As an object emitting a sound approaches an observer, the sound waves expand, so that the observer hears a higher frequency. b. As an object emitting a sound approaches an observer, the sound waves expand, which reduces their energy and dampens the noise. c. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a higher frequency. d. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a lower frequency. 18. Current is measured as which of the following? a. the change in electrical potential per unit of time b. the amount of energy per unit of charge c. the amount of charge that passes per unit of time d. the amount of time it takes for 1 C of charge to pass a point 19.

Which of the following accurately describes the Doppler effect? a. As an object emitting a sound approaches an observer, the sound waves expand, so that the observer hears a higher frequency. b. As an object emitting a sound approaches an observer, the sound waves expand, which reduces their energy and dampens the noise. c. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a higher frequency. d. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a lower frequency. 18. Current is measured as which of the following? a. the change in electrical potential per unit of time b. the amount of energy per unit of charge c. the amount of charge that passes per unit of time d. the amount of time it takes for 1 C of charge to pass a point 19.

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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18. Which of the following accurately describes the Doppler effect? a. As an object emitting a sound approaches an observer, the sound waves expand, so that the observer hears a higher frequency. b. As an object emitting a sound approaches an observer, the sound waves expand, which reduces their energy and dampens the noise. c. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a higher frequency. d. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a lower frequency. Current is measured as which of the following? a. the change in electrical potential per unit of time b. the amount of energy per unit of charge c. the amount of charge that passes per unit of time d. the amount of time it takes for 1 C of charge to pass a point 19. A student has three resistors and trying to design a circuit that will maximize the amount of current going through it. Which of the following circuit diagrams should he choose for his set up? 20. R, а. R2 R, b. R2 R, R3 Vasurce с. R2 R3 d. none of the above
Transcribed Image Text:18. Which of the following accurately describes the Doppler effect? a. As an object emitting a sound approaches an observer, the sound waves expand, so that the observer hears a higher frequency. b. As an object emitting a sound approaches an observer, the sound waves expand, which reduces their energy and dampens the noise. c. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a higher frequency. d. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a lower frequency. Current is measured as which of the following? a. the change in electrical potential per unit of time b. the amount of energy per unit of charge c. the amount of charge that passes per unit of time d. the amount of time it takes for 1 C of charge to pass a point 19. A student has three resistors and trying to design a circuit that will maximize the amount of current going through it. Which of the following circuit diagrams should he choose for his set up? 20. R, а. R2 R, b. R2 R, R3 Vasurce с. R2 R3 d. none of the above
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