Explanation Given data: Frequency of the sound emitted by the sonar system of dolphin is 2 × 10 5 Hz . Formula used: Angular frequency of a wave is: ω = 2 π f Here, ω is the angular frequency of the wave and f is the frequency of the wave. Write the expression for time period of the wave. T = 1 f Here, f is the frequency of the wave. Explanation: The expression for the angular frequency of a wave is: ω = 2 π f Substitute 2 × 10 5 Hz for f and 3.14 for π . ω = 2 ( 3.14 ) ( 2 × 10 5 Hz ) = 1

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Author: Eugenia Etkina, Gorazd Planinsic

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Chapter 11, Problem 9P

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The information about the sound wave if the sonar system of dolphin emits frequency of 2 × 10 5 Hz .

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