A steel needle,though denser than water,can float lengthwise on a surface of water.This is possible due to

Question

Quizplus · Accepted Answer

Surface tension is the property of a liquid that allows it to resist external forces. In the case of the steel needle floating on the surface of water, the surface tension of the water molecules creates a cohesive force that allows the needle to sit on top of the water rather than sinking. This is because the surface tension is stronger than the force of gravity acting on the needle.

A Steel Needle,though Denser Than Water,can Float Lengthwise on a Surface