Question

The coefficient of Apparent expansion of Mercury relative to glass is 0.00015 per °C. The real coefficient of mercury s 0.00018 per°C . Calculate the coefficient of linear expansion of glass.

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Answer 1

Coefficient of real expansion of mercury,

$\gamma r = \frac{0.00018}{c}$

coefficient of apparent expansion of mercury,

$\gamma a = \frac{0.00015}{c}$

coefficient of volume expansion of glass=

$\gamma g$

=>

$\gamma g = \gamma r - \gamma a \\ \gamma g = 0.00018 - 0.00015 = 0.00003$

coefficient of linear expansion of glass

$\alpha g = \frac{ \gamma g}{3} \\ = \alpha g = \frac{0.00003}{3}$

= 0.00001 per°C

=1×10^-5 per °C

Answer 2

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