Chapter - 3 Sound

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Q
Sound

Question:

A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

Answer:

We know,

The number of oscillations per second is called the frequency of oscillation.

Frequency = frac{Number quad of quad oscillations}{Time quad period}

f = frac{40}{4}

f = 10 Hz

Time period is the inverse of frequency,

T = frac{1}{f}

T = frac{1}{10}

T = 0.1 sec


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