Question

A pendulum oscillates 40 times in 4 seconds. Calculate its

(i) time period

(ii) frequency.

(iii) Why sound cannot travel through vacuum?​

Answer 1

Answer:

(i) 10

(iii) because there is no air in it.

Answer 2

Answer:

Hey mate

Explanation:

$(1) \: time \: period \\ = \: \frac{time}{no.of \: oscillation \: in \: time} \\ = \frac{4}{40} = 0.1 \: s$

$(2) \: frequency = \frac{1}{time \: period}$= 10 hertz

3) Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.

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