During thermal expansion, ___ .

length of the substance increases

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surface area of the substance decreases

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volume of the substance increases

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volume of the substance decreases

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Solution

The correct options are
A
length of the substance increases

C
volume of the substance increases

When we increase the temperature of the body, the particles of the substance gain energy, which weakens the force holding them.

This results in an increase in length, surface area and volume of the substance.

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