Calculate the coefficient of cubical expansion of a zinc bar whose volue is increased `0.25 m^(3)` from `0.3 m^(3)` due to change in its temperature of 50K.

A substance having coefficient of critical expansion 4.9 xx 10^(-4)"^0C^(-1) . The fractional change in the density for the rise in temperature 30 K is

The densities of wood and benzene at 0^@C are 880 kg m^(-3) and 900 kg m^(-3) respectively. The coefficients of volume expansion are 1.2 xx10^(-3)C^(-1) for wood and 1.5 xx 10^(-3)C^(-1) for benzene. At what temperature will a piece of wood just sink in benzene?

(a) Find the final temperature of a copper rod. Whose area of cross section changes from 10m^(2) to 11m^(2) due to heating. The copper rod is initially kept at 90K. (Coefficient of superficial expansion is 0.0021/K). (b) The far position of a myopic person is 90 cm is front of the eye. what is the nature and power of the lens required to correct the problem?

Calculate the pH of 0.04 M HNO_3 Solution.

0.1 m^(3) of water at 80^(@)C is mixed with 0.3 m^(3) of water at 60^(@)C . What is the final temperature of the mixture ?