Question

an iron nail sinks and a corck floats when placed on the surface of water because density of corck is​

Answer 1

Answer:

An iron nail sinks and a cork floats when placed on the surface of water because density of cork is less than water

Explanation:

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Answer 2

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Sinking and Floating depends on various factors like weight, density etc. According to above question, the density will determine whether a substance will sink or float.

Why Iron nail sinks?

The density of iron nail is more than that of density of water. ($\rm{\rho_{Fe} > \rho_{H2O}}$) Hence, it will sink at the bottom of the container. Another factor is the surface area. Iron nail have less surface area, hence it sinks. Also this is because the weight is greater than the buoyant force.

Why cork floats?

Cork is made form the light insulating layer of plants. The density of cork is less than that of water. ($\rm{\rho_{cork} < \rho_{H2O}}$) Hence, it will float on the surface. Also this is because the weight is less than the buoyant force.