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What happens when a material is heated?

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What happens when a material is heated?

(a) It contracts

(b) It melts

(c) It expands

(d) It bursts

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This key question is from Thermal Conductivity in section Thermal Properties of Matter of Engineering Physics I

1 Answer

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Correct answer is (c) It expands

Explanation: Most materials expand on heating because the particles are moving about a higher average speed and therefore have a higher energetic collision.

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