If the radius of earth's orbit is made 1/4, the duration of an year will become

The orbital speed for an earth satellite near the surface of the earth 7km-s^-1 ,. If the radius of the orbit is 4 times the radius of the earth is the orbital speed would be

The orbital speed for an earth satellite near the surface of the earth is 7km//sec . If the radius of the orbit is 4 times the radius of the earth, the orbital speed would be

The orbital velocity for an earth satellite near the surface of the earth is 8 km/sec. If the radius of the orbit is 4 times the radius of the earth, its orbital velocity will be

If the mass of the earth is kept constant and its radius is made half, then the duration of the day will be where T is the present duration of the day.

If all objects on the equator of earth feels weightless then the duration of the day will nearly become