If the relative density of a substance is 7.1, what will be its density in SI units?

Fill in the blanks with suitable words:

(a) Force acting on a unit area is called ………..

(b) It is the ……… force which makes objects appear lighter in water.

(c) A heavy ship floats in water because its ………. Density is less than that of water.

(d) In fluids (liquids and gases), pressure acts in ……..directions, and pressure …………..as the depth increases.

(e) In order to sink in a fluid, the density of an object must be ………. Than the …….. of the fluid.

(f) Snow shoes work by spreading out a person’s ………….. over a much bigger ……..

(g) If the area of a snow shoe is five times ……… than the area of an ordinary shoe, them the pressure of a snow shoe on the snow is five times ………………

What is the difference between the density and relative density of a substance?

Define thrust. What is its unit?

A mug full of water appears light as long as it is under water in the bucket than when it is outside water. Why?