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

answer is D.

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Detailed Solution

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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