Question

How will you determine the density of a stone using a measuring jar? Explain in detail. [5 Marks]

Answer 1

Determination of density of a stone using a measuring cylinder.

1. In order to determine the density of a solid, we must know the mass and volume of the stone.
2. The mass of the stone is determined by a physical balance very accurately.
Let it be ‘m’ grams.

3. In order to find the volume, take a measuring cylinder and pour in it some water.
4. Record the volume of water from the graduations marked on measuring cylinder.
Let it be 40 cm3 .
5. Now tie the given stone to a fine thread and lower it gently in the measuring cylinder, such that it is completely immersed in water.
6. Record the new level of water.
Let it be 60 cm3
∴Volume of the solid = (60-40) <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $c{m}^3$ = 20 $c{m}^3$ = V $c{m}^3$
(assume) Knowing the mass and the volume of the stone, the density can be calculate by the formula:
Density =$\frac{mass}{volume}$ = $\frac{m}{v}$ g/$c{m}^3$

[ 5 marks]