There is a mark at the bottom of a beaker. A liquid of refractive index 1.4 is poured into it. If the depth of the liquid is 3.5 cm then determine how much will the mark appear to rise when it is viewed from above?

Why does a balloon filled with hot air rise upward in air?

Why does a metal ball coated with lamp - black appear shining when it is immersed in water?

Two vessels have the same area but different shapes. The first shapes takes twice the volume of water that the second vessel requires to fill up to a particular common height? Is the force exerted by the water on the base of the vessel the same in the two cases? If so, why do the vessels filled with water to that same height give different readings on a weighing scale?

Why does BaSO_(4) is not stable in water ?

Why does sky appear blue?

A rod immersed horizontally in water does not appear small when is viewed normally but appears small if it is kept vertically. Explain.

Why does water rise inside a capillary tube?

A glass vessel is filled with water up to its brim. Now, what will happen if temperature is increased?