When cork and an iron nail are placed in water, which of them will float or sink ?

The cork floats while the nail sinks.The density of cork is less than the density of water.This means that the upthrust of water on the cork is greater than the weight of the cork. So it floats.

The density of an iron nail is more than the density of water.This means that the upthrust of water on the iron nail is less than the weight of the nail. So it sinks.