Calculate the heat evolved for the rise of water when one end of the capillary tube of radius r is immeresed vartically into water. Asssume surface tension =T and density of water to be `rho`A. `(2pi S)/(rho g)`B. `(pi S^(2))/(rho g)`C. `(2pi S^(2))/(rho g)`D. `(4pi S^(2))/(rho g)`

Calculate the heat evolved for the rise of water when one end of the c

1.	Calculate the heat evolved for the rise of water when one end of the capillary tube of radius r is immeresed vartically into water. Asssume surface tension =T and density of water to be `rho`A. `(2pi S)/(rho g)`B. `(pi S^(2))/(rho g)`C. `(2pi S^(2))/(rho g)`D. `(4pi S^(2))/(rho g)`
Answer» Correct Answer - C Potential energy of water column, `U = (mgh)/(2) = (2pi S^(2))/(rho g)` The work performed by force of surface tension is `W = 2pi rSh = (4pi S^(2))/(rho g)` From conservation of energy the heat evolved, `Q = W-U = (2pi S^(2))/(rho g)`

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Calculate the heat evolved for the rise of water when one end of the capillary tube of radius r is immeresed vartically into water. Asssume surface tension =T and density of water to be `rho`A. `(2pi S)/(rho g)`B. `(pi S^(2))/(rho g)`C. `(2pi S^(2))/(rho g)`D. `(4pi S^(2))/(rho g)`

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