Calculate the frequency (in Hz) of a sound wave of wavelength 5 m travelling with a speed of 360 m/s.
A) 1800 B) 36 C) 900 D) 72
Answers
Answered by
9
Answer:
(D) 72 hertz
Explanation:
Given :
- Wavelength of the sound wave = λ = 5 metres
- Speed of the sound = 360 m/s
To find :
- Frequency of the sound wave
Wavelength = speed of the sound / frequency
5 = 360/frequency
5×frequency = 360
Frequency = 360/5 = 72 hertz
The frequency of the sound wave is equal to 72 hertz
Option (D) is hence correct for the above question
Answered by
8
Answer :
Given that wave of wavelength 5 m travelling with a speed of 360 m/s .
We have to find frequency (in Hz) . A) 1800. B) 36. C) 900. D) 72
From data we have :
Wavelength, λ = 5 m
Speed = 360 m/s
Frequency = ?
We know that,
→ Wavelength = Speed/Frequency [λ = v/f]
Substituting values,
→ 5 = 360/Frequency
→ 5 × Frequency = 360
→ Frequency = 360/5
→ Frequency = 72 Hz
Therefore,
∴ Frequency of the sound wave = 72 Hz
Correct answer = D) 72
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