A bob weighs 60 g in air and 40 g in liquid of density 1.000 g / cm 3 at 2 0 ∘ C . At 7 0 ∘ C , liquid density is 0.980 g / cm 3 and apparent bob weight 40.3412 g. Neglect air buoyancy. Find linear co

Question

A bob weighs 60 g in air and 40 g in liquid of density 1.000 g / cm 3 at 2 0 ∘ C . At 7 0 ∘ C , liquid density is 0.980 g / cm 3 and apparent bob weight 40.3412 g. Neglect air buoyancy. Find linear coefficient in units of 1 0 − 6 per °C, using first-order isotropy.

TestHub · Accepted Answer

V 1 ​ = 1 ( 60 − 40 ) ​ = 20 c m 3 ; V 2 ​ = 0.980 ( 60 − 40.3412 ) ​ = 20.06 c m 3 . Fractional volume increase = 0.003 . Thus α = ( 3 × 50 ) 0.003 ​ = 20 × 1 0 − 6 per °C. Requested value 20.0.

Physics - Heat & Thermo Question with Solution | TestHub

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