College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 66

Using 2.3 × 10 17 kg/m 3 as the density of nuclear matter, find the radius of a sphere of such matter that would have a mass equal to that of Earth. Earth has a mass equal to 5.98 × 10 24 kg and average radius of 6.37 × 10 6 m.