Define escape velocity. Derive the expression for it.

Define escape velocity. Derive an expression for escape velocity.

Define escape velocity.Deduce anexpression for the escape velocity and time period of a body that moves in a circular orbit near the earth's surface.

Define orbital speed. Derive the expression for it.

What is escape velocity?

Define electric dipole moment. Is it a scalar or a vector? Derive the expression for the electric field of a dipole at a point on the equatorial plane of the dipole.

Define escape velocity. Show that the escape velocity of a body from earth is independent on its mass.

Define acceleration due to gravity. Derive an expression for the acceleration due to' gravity at a place of latitude lambda on the surface of the earth due to its rotation about its axis.

A rod of length l is moved horizontally with a uniform velocity v in a direction perpendicular to its length through a region in which a uniform magnetic field is acting vertically downward. Derive an expression for the emf induced across the ends of the rod.

Using Bohr's postulates of the atomic model, derive the expression for radius of n-th electron orbit. Hence obtain the expression for Bohr's radius.

Using Bohr's porstulates of atomic model, derive the expression for the radius of the n^(th) orbit.