Question

Rahul ties a string around a stone. He takes three beakers with equal volumes of water, cooking oil and kerosene. He then immerses the stone completely in each of the 3 beakers, one after the other. What is he likely to find?

a) The level of liquid falls by different amounts in the three beakers
b) There is an unequal increase in the level of the three liquids
c) There is an equal increase in the level of the three liquids
d) The level of liquid does not change in any of the three beakers.

Answer 1

Answer:

A) Is the answer

Explanation:

The level of the liquids falls by different amounts in the three beakers.

Answer 2

There is an equal increase in the level of the three liquids. (Option-C)

• Archimedes' principle says that, if a body is completely submerged in a fluid, then the volume of fluid displaced is equal to the volume of the body submerged.
• This implies, the volume of fluid displaced or the change in the level of the fluid is independent of the nature of the fluid. It only friends on the volume of the object immersed.
• In each of the three cases, the same piece of stone is immersed.
• Hence, equal volume is immersed in each fluid. This implies, as per Archimedes' principle, an equal volume of fluid is immersed in each case.
• That's why there is an equal increase in the level of the three liquids in the beakers.