Questions

Coefficient of apparent expansion of mercury in a glass vessel is 153 x 10^-6 /^oC and in a steel vessel is 144 x 10^-6 /°C. If $α$ for steel is 12 x 10^-6 /°C, then that of glass is

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36 X 10-6/ °C

6 X 10-6/ °C

27 X 10-6/ °C

9 X 10-6/ °C

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detailed solution

Correct option is D

γHg/g=γHg -3αg and γHg/s=γHg-3αs ⇒ αg=αs-γHg/g-γHg/s 3 =12×10-6-(153-144)×10-63 =9×10-6/C o

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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
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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