Why some clocks are slow in summer and fast in winter?

Solution

Time period of simple pendulum used in clock is,

straight T equals 2 straight pi square root of ell over straight g end root

where,
L is length of simple pendulum.
Temperature decreases during winters. Therefore, length of simple pendulum will decrease. Since, T ∝ √L; so time period of simple pendulum will decrease and run faster.
In summers, temperature increases. Therefore, the length and hence the time period increases and therefore, the clock will run slower.

Some More Questions From Mechanical Properties of Fluids Chapter

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Mechanical Properties Of Fluids

Why some clocks are slow in summer and fast in winter?

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