1.

A uniform metal rod is used as a bar pendulum. If the room temperature rises by 10 ∘C, and the coefficient of linear expansion of the rod is 2×10−6/ ∘C, the period of the pendulum will have a percentage increase of

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A uniform metal rod is used as a bar pendulum. If the room temperature rises by 10 C, and the coefficient of linear expansion of the rod is 2×106/ C, the period of the pendulum will have a percentage increase of



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