Calculate the rotation kinetic energy of the earth about its own axis.
(M= 6`times 10^24`kg and R = 6400km)

Calculate the moment of inertia of earth about its diamter taking mass 10^25 kg and diameter 12800km.

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 xx 10^24 kg, radius = 6400 km

Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth = 6 xx 10^24 kg and mass of the Sun = 2 xx 10^30kg . The average distance between the two is 1.5 xx 10^11 m .

In the HCI molecule, the separation between the nuclei of the two atoms is about 1.27 A (1 A = 10-^10 m) . Find the approximate location of the CM of the molecule, given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus.

Calculate the energy of a photon of wavelength 6 xx 10^(-5) cm.

The rate constant of reaction is 1.5xx10^7s^-1 at 50^@C and 4.5xx10^7s^-1 at 100^@C . Calculate the value of activation energy for the energy for the reaction (R = 8.314 Jk^-1 mol^-1)

What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth is 6 x 10^24 kg and radius of the earth 6.4 x 10^6 m.)

A rocket is fired from the earth towards the sun. At what distance form the earth's centre is the gravitational force on the rocket zero? Mass of the sun = 2 xx 10^20 kg and mass of earth = 6 xx 10^24 kg and orbital radius 1.5 xx 10^-8 km.