A rectangular metal block of volume 10-6m3 at 2... - JAMB Physics 1995 Question
A rectangular metal block of volume 10-6m3 at 273k is heated to 573k. If its coefficient of linear expansion is 1.2 x 10-5k-1, the percentage change of it volume is
A
1.5%
B
1.1%
C
0.4%
D
0.1%
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Correct Option: B
Y = (\frac{\Delta V}{V \times \Delta \theta})
3 x 10-5 x 1.2 = (\frac{\Delta\ V}{10^{-6}\times\ (573 - 273)})
(\Delta)V = 1080 x 10-11m3
%(\Delta)V = (\frac{1080 \times\ 10}{10^{-6}}) x 100
= 1.08%
(\approx) = 1.1%
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