Question

Explain why an iron nail sinks into the water while a cork does not sink into water?

Answer 1

1. Relative density is the ratio of the density of a substance to the ratio of water at $4°C$.
2. $Relativedensity=\frac{densityofsubs\tan ce}{densityofwater4°C}$.
3. The substance whose density is more than water will sink into the water.
4. The substance whose density is less than water will float in the water.
5. As, the density of iron is more than water so it sinks and the density of cork is less than water so it floats.

Hence, due to the difference between the density of iron and nail, iron having a greater density than water will sink into the water, and cork having less density than water will float.