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A brass disc fits snugly in a hole in a ...

A brass disc fits snugly in a hole in a steel plate. Should you heat or cool this system to losen the disc from the hole ? given that `alpha _b gt alpha _Fe`.

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Verified by Experts

The correct Answer is:
We will cool the system
Since `alpha_(s) lt alpha_(b)` there will be less contraction in steel as compared to brass.
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RESONANCE-CALORIMETRY AND THERMAL EXPANSION-Exercise
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