______ cells cover the surface of the body for protection

Objects placed at rest on earth : ______ :: Bodies slide over the surface on other body : ____.

A body of mass M is kept on a rough horizontal surface (friction coefficient =μ). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the horizontal surface on the surface of the body is F, where

A body moves is a circle of radius .2R. what is the distance covered and displacement of the body after 2 complete rounds?

Asseration : Sporozoans may have silica shells on their surface. Reason : Shells of sporozoans help in protection from acidic environment of the host.

How does the friction arise between the surfaces of two bodies in relative motion?

The epithelial cells lining the stomach of vertebrates are protected from damage by HCl because

_____ carries the impulse towards the cell body.