The density of water is 1.0 g cm^-3. The density of iron is 7.8 g cm^-3. The density of mercury is 13.6 g cm^-3. Answer the following:

(a) Will a piece of iron float or sink in water?

(b) Will a piece of iron float or sink in mercury?

The diagram given below shows a body floating in three different liquids A, B and C at different levels.

(a) In which liquid does the body experience the greatest buoyant force?

(b) Which liquid has the least density?

(c) Which liquid has the highest density?

Why does a piece of ice float on water?

Explain why an iron needle sinks in water, but a ship made of iron floats on water.