The density of a substance at 200Cand1200C are 1.1g/ccand1g/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 A0.0010C Initial density d1=1.1gm/c.c Final density d2=1gm/c.c. Initial temperature t1=20∘C Final temperature t2=120∘C From, γ=d1−d2d2(t2−t1) =1.1−11(120−20)=0.1100=0.001 ∴γ=0.001/∘C