…………of the earth's surface is covered by water . (Half/Three fourths).

Total earth's surface covered by water is

It is estimated that mainly ..... of thee earth's terrestrial surface is covered by lichens .

Assuming the earth to be a sphere of radius 6370 km, how many square kilometres is area of the land, if three-fourth of the earth’s surface is covered by water?

Assuming the earth to be a sphere of radius 6370 km, how many square kilometres is area of the land, if three-fourth of the earths surface is covered by water?

The ratio of earth's surface area as covered by two communication satellite moving synchronously in equatorial plane with orbital speed of 1/sqrt2 times and sqrt3/5 times that of required orbital speed near earths surface is

A satellite is projected vertically upwards from an earth station. At what height above the earth's surface will the force on the satellite due to the earth be reduced to half its value at the earth station? (Radius of the earth is 6400 km.)

At what altitude (h) above the earth's surface would the accelration due to gravity be one fourth of its value at the earth's surface ?

The orbital velocity of an artificial in a circular orbit just above the earth's surface v. For a satellite orbiting at an altitude of half the earth's radius the orbital velocity is

The orbital velocity of an artifical satellite in a cirular orbit above the earth's surface at a distance equal to radiu of earth is v. For a satellite orbiting at an altitude half of earth's radius, orbital velocity is