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The cubic expansivity of mercury is 1.8 x 10-4K-1 and the linear expansivity of glass...

Physics
WAEC 2000

The cubic expansivity of mercury is 1.8 x 10-4K-1 and the linear expansivity of glass 8.0 x 10-6K-1, calculate the apparent expansivity of mercury in a glass container

  • A. 1.00 x 10-4K-1
  • B. 1.56 x 10-4K-1
  • C. 1.72 x 10-4K-1
  • D. 2.04 x 10-4K-1
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Correct Answer: Option B
Explanation

γ\(_r\) = γ + γ\(_{app}\)

1.8 x 10\(^{-4}\) = (3 x 8.0 x 10\(^{-6}\)) + γ\(_{app}\)

γ\(_{app}\) = 1.8 x 10\(^{-4}\)  - 2.4 x 10\(^{-5}\)

= 1.56 x 10\(^{-4}\)K\(^{-1}\)


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