1.

The volume of a bulb of mercury thermometer at 0^(@) C is V_0 and cross sectional area is A_0 and alpha_(g) is the coefficient of linear expansion of the glass and gamma_(m) is the coefficient of cubical expansion of mercury. If the mercury fills the bulb at 0^(@) C what is the length of mercury in capillary at t^(@) C.

Answer»

`(V_(0) t ( gamma_(m) - 3 alpha_(g)) )/( A_(0) [ 1+ 2 alpha_(g) t ] )`
`( V_0 ( gamma_(m) - alpha_(g) ) )/( 1 + 2alpha_(g) t) `
`( A_(0) ( gamma_(m) - 3 alpha_(g ) ))/( V_0 [ 1+ 2 alpha_(g)t] ) `
`( gamma_(m) - 3 alpha_(g) )/( 1 + 2alpha_(g) t) `

Answer :A


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