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Question
A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity of sound waves is ______.
Options
$$100 \mathrm{~ms}^{-1}$$
$$1000 \mathrm{~ms}^{-1}$$
$$10,000 \mathrm{~ms}^{-1}$$
none of these
MCQ
Fill in the Blanks
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Solution
A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity of sound waves is $${\underline{\mathbf{1000 \mathbf{~ms}^{-1}}}}$$.
Explanation:
\[ v=f\lambda \]
\[=400\times2.5 \]
\[= {\mathrm{1000\ \mathrm{m\,s^{-1}}}} \]
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