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A torsional pendulum consists of a solid disc connected

Question:

A torsional pendulum consists of a solid disc connected to a thin wire $\left(\alpha=2.4 \times 10^{-5} /{ }^{\circ} \mathrm{C}\right)$ at its center. Find the percentage change in the time period between peak winter $\left(5^{\circ} \mathrm{C}\right)$ and peak summer $\left(45^{\circ} \mathrm{C}\right)$.

Solution:

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