7. A wave moves at a constant speed along a string. Which one of the following statements is false concerning the motion of particles in the string? A) The particle speed is constant. B) The particle speed is not the same as the wave speed. C) The particle speed depends on the amplitude of the periodic motion of the source. D) The particle speed depends on the frequency of the periodic motion of the source. E) The particle speed is independent of the tension and linear density of the string. 8. When a mass of 3.0-kg is hung on a vertical spring, it stretches by 0.085 m. Determine the period of oscillation of a 4.0-kg object suspended from this spring. A. 0.68 s C.5.6 s D. 9.4 s B. 0.82 s 9. In a certain antique clock, a pendulum has worn out over time and has a length L, which gives a period T, = 0.9 s. The length of the pendulum is adjusted to a new value L, such that the time period is corrected to T2=1.0 s. What is the ratio L2/L1? A) 0.90 B) 0.95 C) 1.11 D) 1.23 10. The decibel level of a jackhammer is 125 dB relative to the threshold of hearing. Determine the decibel level if three jackhammers operate side by side. A) 65 dB B) 130 dB C) 148 dB D) 260 dB E) 375 dB

7. A wave moves at a constant speed along a string. Which one of the following statements is false concerning the motion of particles in the string? A) The particle speed is constant. B) The particle speed is not the same as the wave speed. C) The particle speed depends on the amplitude of the periodic motion of the source. D) The particle speed depends on the frequency of the periodic motion of the source. E) The particle speed is independent of the tension and linear density of the string. 8. When a mass of 3.0-kg is hung on a vertical spring, it stretches by 0.085 m. Determine the period of oscillation of a 4.0-kg object suspended from this spring. A. 0.68 s C.5.6 s D. 9.4 s B. 0.82 s 9. In a certain antique clock, a pendulum has worn out over time and has a length L, which gives a period T, = 0.9 s. The length of the pendulum is adjusted to a new value L, such that the time period is corrected to T2=1.0 s. What is the ratio L2/L1? A) 0.90 B) 0.95 C) 1.11 D) 1.23 10. The decibel level of a jackhammer is 125 dB relative to the threshold of hearing. Determine the decibel level if three jackhammers operate side by side. A) 65 dB B) 130 dB C) 148 dB D) 260 dB E) 375 dB

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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Concept explainers

Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.

Question

7. A wave moves at a constant speed along a string. Which one of the following
statements is false concerning the motion of particles in the string?
A) The particle speed is constant.
B) The particle speed is not the same as the wave speed.
C) The particle speed depends on the amplitude of the periodic motion of the source.
D) The particle speed depends on the frequency of the periodic motion of the source.
E) The particle speed is independent of the tension and linear density of the string.
8. When a mass of 3.0-kg is hung on a vertical spring, it stretches by 0.085 m. Determine
the period of oscillation of a 4.0-kg object suspended from this spring.
A. 0.68 s
B. 0.82 s
C.5.6 s
D. 9.4 s
9. In a certain antique clock, a pendulum has worn out over time and has a length L, which
gives a period T, = 0.9 s. The length of the pendulum is adjusted to a new value L2 such
that the time period is corrected to T2 = 1.0 s. What is the ratio L2/L1?
A) 0.90
B) 0.95
C) 1.11
D) 1.23
10. The decibel level of a jackhammer is 125 dB relative to the threshold of hearing.
Determine the decibel level if three jackhammers operate side by side.
A) 65 dB
B) 130 dB
C) 148 dB
D) 260 dB
E) 375 dB

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