Question
Give reason: A ship made of iron floats in water but a piece of rail sinks.
Answer
A ship made of iron floats in water because its overall density is less than the density of water. The ship is designed to displace a large volume of water, which generates a buoyant force that is greater than the weight of the ship. In contrast, a piece of rail is more dense than water, so it sinks. The buoyant force acting on the rail is not sufficient to counteract its weight, causing it to sink.
