When you weigh 680 N on the earth, what would be your weight on the surface of the neutron star that consists of the similar mass as our sun and a diameter of 18.0 km?
Take the mass of sun to be Mu s = 1.99×1030 kg, the gravitational constant to be = 6.67×10-11 N*m^2/kg^2, and the acceleration due to gravity at the surface of earth to be = 9.810 m/s^2.