First slide

Thermal expansion

Question

A small amount of mercury ‘Hg’ is taken in a container such that its expansion is equal to expansion of container made of glass then $γ_{H g} = \underline{x} γ_{g}$ . Where $x =$
$(γ_{H g} i s c o e f f i c i e n t o f v o l u m e e x p a n s i o n o f m e r c u r y; γ_{g} c o e f f i c i e n t o f v o l u m e e x p a n s i o n o f g l a s s)$

Easy

A

7
B

$\frac{1}{7}$
C

5
D

$\frac{1}{5}$

Solution

$i f γ_{H g} i s c o e f f i c i e n t o f v o l u m e e x p a n s i o n o f m e r c u r y; γ_{g} c o e f f i c i e n t o f v o l u m e e x p a n s i o n o f g l a s s t h e n p r a c t i c a l l y f o u n d r e l a t i o n i s γ_{H g} = 7 γ_{g}$

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