The difference in lengths of two metal rods A and B is 40 cm at all temperatures. Calculate the lengths of the two rods if `alpha` of `A = 12xx10^(-6)//^@C` and `alpha` of `B= 18xx10^(-6)//^@C`.

The difference in length of two metal rods A and B is 25 cm at all temperatures. Coefficients of linear expansion of the materials of A and B are 1.28 times 10^(-5@)C^(-1) " and " 1.92 times 10^(-5@)C^(-1) respectively. Find the length of each rod at 0^(@)C .

The difference in lengths of an iron and a copper rod, both at 50^(@)C " and " 450^(@)C , is 2 cm. What are the lengths of the two rods at 0^(@)C ? [Given, alpha_(Fe)=12 times 10^(-6@)C^(-1) " and " alpha_(Cu)=17 times 10^(-6@)C^(-1) ]

The difference in lengths of two rods, made up of different materials, remains constant at all temperatures. Show that their lengths at 0^(@)C are inversely proportional to their coefficients of linear expansion.

The difference in lengths of two rods, made up of different materials, remains constant at all temperatures. Show that their lengths at 0^(@)C are inversely proportional to their coefficients of linear expansion.

Calculate the wavelength of an alpha -particle having an energy of 6.8xx10^(-18)J .

Calculate the wave length of two lines H_alpha and H_beta of Balmcr series. R= 109670 cm^-1

Diameter of a brass disc at 30^(@)C is 10 cm. What will be the increase in area of the disc at 70^(@)C ? alpha for brass =18 times 10^(-6@)C^(-1) .