T F Simple harmonic motion can be represented by a sine curve. T F A violin stri
ID: 1628387 • Letter: T
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T F Simple harmonic motion can be represented by a sine curve. T F A violin string that vibrates with a frequency of 196 Hz produces a sound wave with a frequency of 1/196 Hz. T F A pendulum with a mass of 10 g and a length of 20 cm swings back and forth more frequently than a pendulum with a mass of 20 g and a length of 10 cm. T F The wavelength produced by a violin string with a frequency of 196 Hz is greater than the wavelength produced by a piano string with a frequency of 262 Hz. T F When a transverse wave moves in a medium, the motion of the medium is in the same direction as the motion of the wave. T F When the crests of two waves overlap, the result is destructive interference. T F All elastic materials have a natural frequency. T F Accelerating electric charges produce longitudinal waves. T F In a vacuum, blue light moves at a faster speed than red light. T F Blue light has a higher frequency than red light. Answer the following questions by writing on the blank lines the letter(s) of the word or phrase that best complete(s) the statement or answers the question. Choose only one answer unless a particular question indicates otherwise. 1. _________ How does a wave differ from a vibration? (A) A vibration can produce a wave, but a wave cannot produce a vibration. (B) A wave travels in space, but a vibration does not. (C) A wave produces simple harmonic motion, but a vibration does not. (D) A wave has a different frequency from the vibration that produces it. (E) none of these ---------- Sound waves in air are produced by which of the following? (A) photons (B) radio waves (C) accelerating electrical charges (D) a succession of compressions and rarefactionsExplanation / Answer
1 T can be represented by cos and combination of both also
2 T
3 false pendulum of length 20cm wil have greater time period acc to formula T=2×pi(l/g)^1/2
4 F
5 F perpendicular direction
6 F constructive for distructive crest overlaps trough
7 T
8 F transverse wave accelerating charge produce light waves
9 F in vaccum all colours travel with same speed
10 T as energy of blue greater than red
Sound waves are produced by a succession of compressions and rerefractions
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