If the molecules of substance attracts each other then the area of surface and ….. And surface energy ……(increases / decreases , write proper word)

If the molecules of body repel to each other then the area of surface …… and surface energy ……(increases decreases write proper word)

As the area of surface is small then potential energy of its molecule is ….(more/less)

As the area of surface is large then potentials energy of molecules is …. (more /less)

Find the Total surface area of each of the following cylinders.

Can you find the surface area of sphere in any other way?

The volume of a cube increases at a consant rate. Prove that the increase in its surface area varies inversely as the length of the side.

Find the approximate change in the surface area of a cube of side x metres caused by decreasing the side by 1%.

Two soap bubbles each of radius r are touching each other. The radius of curvature of the common surface will be:

Two plates of equal areas are placed in contact wih each other. Their thickness are 2.0 cm and 5.0 cm respectively. The temperature of the external surface of the first plate is -20^(@)C and that of the external surface of the second plate is 20^(@)C . What will be the temperature of the current surface if the plates (i) are of the same material, (ii) have thermal conductivities in the ratio 2:5 .

Two large thin metal plates are parallel and close to each other on their inner faces the plates have surface charges densites of opposite region of the first plate (b) in the outer region of the second plate and (c ) between the plates