SAT Subject Physics Practice Question 271: Answer and Explanation

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Question: 271

42. A traveling wave has a frequency of 6.0 Hz, an amplitude of 0.2 m, and a wavelength of 0.5 m. What is its wave speed?

A. 0.1 m/s
B. 0.6 m/s
C. 1.2 m/s
D. 2.4 m/s
E. 3.0 m/s

Correct Answer: E


Use the equation that relates wavelength, frequency, and wave speed.

v = λf = (0.5 m)(6.0 Hz) = 3.0 m/s

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