A metal sheet of area 100cm2 was heated through... - WAEC Physics 2012 Question
A metal sheet of area 100cm2 was heated through 70oC. Calculate its new area if the linear expansivity of the metal is 0.000017k-1
A
100.06 cm2
B
100.12cm2
C
100.24cm2
D
100.36cm2
correct option: c
A2 = A1(1 + 2 x \(\theta\))
= 100(1 + 2 x 1.7 x 10-5 + 70)
= 100.238
= 100(1 + 2 x 1.7 x 10-5 + 70)
= 100.238
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