Certain neutron stars are believed to be rotating at about `1rev//sec` . If such a star has a radius of 20 km , the acceleration of an object on the equator of the star will be

Certain extremely dense neutron stars are believed to be rotating at about 1 rev/sec. If such a star has a radius of 20 km, the acceleration of an object in m//sec^(2) on the equator of the star will be

The angular velocity of rotation of star (of mass M and radius R ) at which the matter start to escape from its equator will be

The angular velocity of rotation of star (of mass M and radius R ) at which the matter start to escape from its equator will be

The mass ofa star is 3.98 xx 10^30 kg and its radius is 106 km. It rotates.about its axis with an angular speed of 10^(-6) rad/s. Calculate the speed of the star when it collapses to a radius of 10^4 km ? Assume the moment of inertia of the star to be 2/5 mr^(2) .

A pair of stars rotates about their centre of mass One of the stars has a mass M and the other has mass m such that M =2m The distance between the centres of the stars is d (d being large compared to the size of either star) . The ratio of kinetic energies of the two stars (K_(m) //K_(M)) is .

A pair of stars rotates about their centre of mass One of the stars has a mass M and the other has mass m such that M =2m The distance between the centres of the stars is d (d being large compared to the size of either star) . The ratio of kinetic energies of the two stars (K_(m) //K_(M)) is .

A pair of stars rotates about their centre of mass One of the stars has a mass M and the other has mass m such that M =2m The distance between the centres of the stars is d (d being large compared to the size of either star) . The period of rotation of the stars about their common centre of mass (in time of d ,m ,G) is .

A pair of stars rotates about a common centre of mass. One of the stars has a mass M and the other has mass m such that =2m. The distance between the centres of the stars is d ( d being large compare to the size of eithe star). The period of rotation of the stars about their common centre of mass ( in terms of d,m,G) is