The average density of Earth's crust 10 km beneath the surface is `2.7gm//cm^(3)`. The speed of longitudinal seismic waves at that depth is `5.4km//s` The bul modulus of Earth's crust considering its behaviour as fluid at that depth is:

At a height of 10 km above the surface of earth, the value of acceleration due to gravity is the same as that of a particular depth below the surface of earth. Assuming uniform mass density of the earth, the depth is,

The radius of earth is 6.37xx10^6 m , its mean density is 5.5 g*cm^(-3) . Calculate the earth's surface potential.

(a) Find the acceleration due to gravity in a mine of depth 640 km if the value at the surface is 9.800 m//s^(2) . The radius of the earth is 6400 km (b) Find the height over the earth's surface at which the weight of a body becomes half of its value at the surface.

The average density of the earth is 5500kg*m^(-3) the gravitational constant is 6.7xx10^(-11)N*m^2*kg^(-2) and the radius of the earth is 6400 km. Using the given values, find the magnitude of the acceleration due to gravity on the surface of the earth.

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.

If .g. on the surface of the earth is 9.8 ms^(-2) , find its value at a depth of 3200km (radius of the earth = 6400km)

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

If 'g' on the surface of the earth is 9.8ms^(-2) , find its value at a depth of 3200 km (radius of the earth = 6400 km)