Earth

A satellite of mass m is revolving around the Earth at a height R above the surface of the Earth. If g is the gravitational intensity at the Earth’s surface and R is the radius of the Earth, then the kinetic energy of the satellite will be:

Heat received by the Earth due to solar radiations is 1.35 KWm^(-2) . It is also known that the temperature of the Earth’s crust increases 1^(@)C for every 30 m of depth. The average thermal conductivity of the Earth’s crust is K = 0.75 J (msK)^(-1) and radius of the Earth is R = 6400 km . (i) Calculate rate of heat loss by the Earth’s core due to conduction. (ii) Assuming that the Earth is a perfect block body estimate the temperature of its surface.

Gravitational Field Strength Of Earth|Value Of g On Earth Surface|Value Of g At A Height h Above The Earth's Surface|Value Of g At A Depth h Below The Earth's Surface|Effect Of Earth's Rotation On Value Of g

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.)

Our earth behaves as it has a powerful magnet within it. The value of magnetic field on the surface of earth is a few tenth of gauss (1G = 10^(-4) T) There are three elements of Earth’s magnetism (i) Angle of declination (ii) Angle of dip (iii) Horizontal component of Earth’s magnetic field. In the magnetic meridian of a certain place, the horizontal component of Earth’s magnetic field is 0.6 G and the dip angle is 53^@ . The value of vertical component of earth's magnetic field at this place is

A body is projected up from the surface of the earth with a velocity half the escape velocity at an angle of 30^(@) with the horizontal. Neglecting air resistance and earth’s otation, find (a) the maximum height above the earth’s surface to which the body will rise. (b) will the body move around the earth as a satellite?

What impulse need to be given to a body of mass m , released from the surface of earth along a straight tunnel passing through centre of earth, at the centre of earth, to bring it to rest. (Mass of earth M, radius of earth R)

The radius of a planet is 1/4 of earth’s radius and its acceleration due to gravity is double that of earth’s acceleration due to gravity. How many times will the escape velocity at the planet’s surface be as compared to its value on earth’s surface