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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
Speed=Wavelength × Frequency
= (0.016 ×22,000) m/s
= 352 m/s

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