About ____ of the Earth's surface is covered in water.
About three-fourths of the earth's surface is covered with water. Why then is there a shortage of water?
A satellite is revolving round the earth in circular orbit at some height above surface of earth. It takes 5.26× 103 seconds to complete a revolution while its centripetal acceleration is 9.92 m/s2 . Height of satellite above surface of earth is (Radius of earth 6.37×106 m)