Question

After the storm, the sea water waves subside due to:
A. Surface tension of sea-water
B. Disappearance of heavy currents
C. The viscosity of sea water
D. Gravitational pull of the storm

Answer 1

Here we should know the concept of viscosity of fluid. In fluid mechanics we refer to frictional force as viscous force and in mechanics we refer as frictional force. Then we can easily find the solution to the above question.

Complete step by step answer: As per the above question, after the storm. Cohesive forces develop in intermolecular force of attraction in the particles. Especially, these kinds of attraction forces develop between molecules of similar substance.
The sea water waves subside because the viscosity develops in sea water. The main cause of viscosity is cohesive force which exerts in the intermolecular force of attraction between the particles. Hence, because of the cohesive force the sea water waves subside and cohesive force develop between the water molecules or particles.

Hence the correct option is C

Additional information: The attraction forces between the different types of molecules are called adhesive forces. These kinds of forces arise in liquid drops clinging to window panes.

Note: The liquid molecules are held together by attractive forces. The sum of all collective forces on liquid molecules is zero. The net force on the liquid molecule is a non-zero in the direction along with the bulk. The energy consumed by an increase in the surface area in this process is called surface energy.