Question

12. A solid has density 0.8 g/cm. It is put on water contained in a vessel, it will
(a) sink
(b) floats with 80% volume submerged
(c) float with 20% volume submerged
(d) float fully immersed​

Answer 1

Answer:

B

Explanation:

it density is less then water ( 1 gm/cm3 ) , so it will float and ratio of densities will be the ratio of volume which is inside water.

So

$\frac{0.8}{1} = \frac{8}{10} \times 100 = 80\%$

Answer 2

The solid will float with 80% volume submerged in the water. (Option B)

• First of all,the density of the water is 1 gm/cm³ and the density of the solid is 0.8 gm/cm³.

So,it is clear that the density of the solid is less than the density of water and that's why the solid will float on the water.

• Now,to calculate the submergence percentage,we have to use the following mathematical formula

= 100× Density of solid / Density of water

= 100× 0.8/1

= 80%

So,the 80% of the solid's volume will be submerged into the water,as mentioned in the option B. (Answer)