Question

How will you determine the density of a stone using a measuring jar?

Answer 1

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) cm³
= 20 cm³ = V cm³ (assume)
Knowing the mass and the volume of the stone, the density can be calculate by the formula:

Density = `"mass"/"volume"`= `"m"/"v"` g/cm3