If the field near the earth's surface is 300V `m^(-1)` directed downwards , what is the surface density of change on the surface of the earth?

What is the strength of earth's magnetic field at the surface of earth?

A rocket is fired with a speed v = 2 sqrt (gR) near the earth's surface and directed upward, what is intersteller speed of rocket v^' , where v_e escape speed on the surface of earth

The electric field near the surface of the earth is 300V//m . The surface density of charge on the earth's surface is

The magnitude of the average electric field normally present in the earth's atmosphere just above the surface of the earth is about 150 N/C, directed downward. What is surface charge density of the earth? [Assume that the earth is a conductor having uniform surface charge density.]

The weight of a body on the surface of moon is 1/6th of that on the Earth's surface. It is because acceleration due to gravit on the surface of moon is six times that on the surface of the Earth.

The main atmospheric layer near the surface of the Earth is

The kinetic energy needed to project a body of mass m from the earth's surface to infinity is (R is radius of the earth, g is gravitational acceleration on the surface of the earth)

Rate of change of weight near the earth's surface varies with height h as