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If 20 compressions pass a point in 4 seconds, the frequency is ______.

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Question

If 20 compressions pass a point in 4 seconds, the frequency is ______.

Options

  • 80 Hz

  • 5 Hz

  • 10 Hz

  • 0.2 Hz

MCQ
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Solution

If 20 compressions pass a point in 4 seconds, the frequency is 5 Hz.

Explanation:

Number of compressions = 20

Time = 4 seconds

We know that,

\[ \text{Frequency}=\frac{\text{Number of compressions}}{\text{Time}} \]
\[ f=\frac{20}{4}=\boxed{5\text{ Hz}} \]

Hence, the frequency is 5 Hz.

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Chapter 10: Sound Waves: Characteristics and Applications - Revise, Reflect, Refine [Page 205]

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NCERT Science Exploration [English] Class 9
Chapter 10 Sound Waves: Characteristics and Applications
Revise, Reflect, Refine | Q 3. | Page 205
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