138710 A mass of $6 \times 10^{24} \mathrm{~kg}$ is to be compressed in a sphere in such a way that the escape velocity from the sphere is $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$. What should be the radius of the sphere?
$\left(G=6.67 \times 10^{-11} \mathrm{~N}-\mathrm{m}^{2} / \mathrm{kg}^{2}\right)$

138711 A satellite in a circular orbit of radius $R$ has a period of $4 \mathrm{~h}$. Another satellite with orbital radius $3 R$ around the same planet with have a period (in hours)

138712 For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

138713 A body is projected vertical upwards from the surface of a planet of radius $r$ with a velocity equal to $1 / 3$ rd the escape velocity for the planet. The maximum height attained by the body is :

138710 A mass of $6 \times 10^{24} \mathrm{~kg}$ is to be compressed in a sphere in such a way that the escape velocity from the sphere is $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$. What should be the radius of the sphere?
$\left(G=6.67 \times 10^{-11} \mathrm{~N}-\mathrm{m}^{2} / \mathrm{kg}^{2}\right)$

138711 A satellite in a circular orbit of radius $R$ has a period of $4 \mathrm{~h}$. Another satellite with orbital radius $3 R$ around the same planet with have a period (in hours)

138712 For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

138713 A body is projected vertical upwards from the surface of a planet of radius $r$ with a velocity equal to $1 / 3$ rd the escape velocity for the planet. The maximum height attained by the body is :

138710 A mass of $6 \times 10^{24} \mathrm{~kg}$ is to be compressed in a sphere in such a way that the escape velocity from the sphere is $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$. What should be the radius of the sphere?
$\left(G=6.67 \times 10^{-11} \mathrm{~N}-\mathrm{m}^{2} / \mathrm{kg}^{2}\right)$

138711 A satellite in a circular orbit of radius $R$ has a period of $4 \mathrm{~h}$. Another satellite with orbital radius $3 R$ around the same planet with have a period (in hours)

138712 For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

138713 A body is projected vertical upwards from the surface of a planet of radius $r$ with a velocity equal to $1 / 3$ rd the escape velocity for the planet. The maximum height attained by the body is :

138710 A mass of $6 \times 10^{24} \mathrm{~kg}$ is to be compressed in a sphere in such a way that the escape velocity from the sphere is $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$. What should be the radius of the sphere?
$\left(G=6.67 \times 10^{-11} \mathrm{~N}-\mathrm{m}^{2} / \mathrm{kg}^{2}\right)$

138711 A satellite in a circular orbit of radius $R$ has a period of $4 \mathrm{~h}$. Another satellite with orbital radius $3 R$ around the same planet with have a period (in hours)

138712 For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

138713 A body is projected vertical upwards from the surface of a planet of radius $r$ with a velocity equal to $1 / 3$ rd the escape velocity for the planet. The maximum height attained by the body is :