A piece of iron weighs 44.5 gf in air. If the density of iron is 8.9 x 10³ kg m^-3, find the weight of the iron piece when immersed in water.

A piece of stone of mass 15.1 g is first immersed in a liquid and it weighs 10.9 gf. Then on immersing the piece of stone in water, it weighs 9.7 gf. Calculate —

(a) the weight of the piece of stone in air,

(b) the volume of the piece of stone,

(c) the relative density of stone,

(d) the relative density of the liquid.

A body weighing W floats partially above and partially below the liquid when (F^'_B denotes maximum upthrust) :

1. W > F^'_B
2. W = F^'_B
3. W < F^'_B
4. none of these

A body of weight W is floating in a liquid. Its apparent weight will be:

1. equal to W
2. less than W
3. greater than W
4. zero