Questions

A weight thermometer contains 20 gm of mercury at 0°C and when its temperature is raised to 100°C. 315 gm of mercury is expelled. If the coefficient of linear expansion of glass is 0.0000066 per °C, the coefficient of absolute expansion of mercury is

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0.0001600/°C

0.0001650/°C

0.0001700/°C

0.0001798/°C

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detailed solution

Correct option is D

γa=m0−mtmt(T−0) =0⋅315(20−0⋅315)×(100−0) =0⋅00016/∘CNow, γ=γa+γg=γa+3α=0⋅00016+3×(0⋅0000066)=0⋅0001798/∘C∴Coefficient of real expansion of mercury =0.0001798/°C.

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Similar Questions

A vessel having coefficient of cubical expansion $γ_{g}$ contains liquid Of coefficient of real expansion r_R up to certain level. When Vessel
Is heated, match column I and column II.

	Column - I		Column - II
a	$γ_{g} < γ_{R}$	p	liquid level rises continuously from beginning
b	$γ_{g} = γ_{R}$	q	liquid level falls continuously from beginning
c	$γ_{g} > γ_{R}$	r	liquid level remains same
d	$γ_{g} = 0$	s	liquid level first falls and then rises