Questions

When their is a colloid in the solution, then it will show the Brownian movement, such as dust particle in the air will show the Brownian movement.

Hence, Brownian movement arises due to the impact of the molecules of the dispersion medium with the colloidal particles. It has been postulated that the impact of the molecules of dispersion medium on the colloidal particles are unequal.

This leads to the zig-zag (random) motion of the colloidal particles.

An object at rest may have Potential energy.

Tropical cockroach

C. F. Andrews - Charles Freer Andrews was known as Deenbandhu. He was given this name by Mahathma Gandhi for his contributions towards Indian independence. 

Deenbandhu means a friend of the poor.

“I have a general inclination to stand for the rights of humans. Maybe that is why they elected me as the college President of Students’ Union . I have studied Law for 4 years; I have matured a keen interest in Intellectual Property and would love to try the field in corporate law. I am additionally an articulate and assertive spokesperson. Having said that, I believe I have the keenness to practice law , skill set, and proper attitude and mold a career for myself.”