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Mechanical Properties of Fluids
Question
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Why a vibrating pendulum does not produce sound? Explain.

Answer

The frequency of vibrating pendulum is less than audible range.
Hence, no sound is heard from the vibrating pendulum. 

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Some More Questions From Mechanical Properties of Fluids Chapter

What is sound?

How sound is produced?

Can sound travel in vacuum?

Can two persons hear each other on the moon? Explain.

Can electromagnetic wave propagate in vacuum?

Can we listen in vacuum?

Which of the two moves forward during wave motion - particle or disturbance?

What type of wave is sound wave when it travels in air?

What type of wave is sound wave when it travels in solids?

Which of the two - sound or light is longitudinal in nature?