Why does oil form a thin film over the surface of water?

Why does oil spread over the surface of water?

Why does an object float or sink when placed on the surface of water?

Explain why rain drops are spherical while the surface of water in a pond is flat.

Why does AlCl_3 fume in air?

Why does a block of plastic released under water come up to the surface of water?

Why does friction increase if the two surfaces are pressed ?

Why does PCl_3 fume in moisture?

Two cubes each with side b are joined to form a cuboid. What is the surface area of this cuboid? Is it 12b^2 ? Is the surface area of cuboid formed by joining three such cubes, 18b^2 ? Why?

Why does physisorption decrease with the increase of temperature?

A U-shaped wire is dipped in a soap solution, and removed. The thin soap film formed between the wire and the light slider supports a weight of 1.5 xx10^-2 N (which includes the small weight of the slider). The length of the slider is 30 cm. What is the surface tension of the film?