Second term PHYSICS class test- 2 of class 9 held on 09/09/2022

 1.why a dead body float with its head immersed into the water?  [1]

2.Which of the two will weight more in air 

1kg of cotton or 

1 kg of iron

and explain why?  [2]

3. A piece of iron of density  7.8 × 10³ kgm-³ and volume 100 cm-³ is completely immersed in water.calculate:

A) the weight of iron in air.

B) apparent weight.  [2]

4.A body of weight 1 kgf is floating in water.what is the weight of water displaced?what is apparent weight of body in water?  [2]

5.Derive a relation between height of submerged part of floating body ,the densities of liquid and the body. [3]