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Seismic Waves

An ultrasonic...

Question

An ultrasonic sound generator generates a wave of wavelength 1.6 cm and frequency 22 kHz.

i. What is the speed of the ultrasonic wave?

[2 mark]

A

320 m/s

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B

342 m/s

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C

350 m/s

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D

352 m/s

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Solution

The correct option is D 352 m/s
Given,
Wavelength = 1.6 cm = 0.016 m
Frequency = 22,000 Hz
$S p e e d = W a v e l e n g t h \times F r e q u e n c y$
= (0.016 $\times$ 22,000) m/s
= 352 m/s

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