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Question

The density of a substance at 200C and 1200C are 1.1 g/cc and 1 g/cc respectively. The coefficient of cubical expansion of the solid is.

A
0.0010C
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B
0.0020C
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C
0.0030C
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D
0.0040C
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Solution

The correct option is A 0.0010C
Initial density d1=1.1gm/c.c
Final density d2=1gm/c.c.
Initial temperature t1=20C
Final temperature t2=120C
From, γ=d1d2d2(t2t1)
=1.111(12020)=0.1100=0.001
γ=0.001/C

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