I think the answer is they are all made up atoms
KE = 1/2 mv^2
KE = 1/2 (700)(80)^2
KE = 2240000 J
A star may form a black hole
once is true. After the marked supernova explosion, the star shrinks because it
sheds away the gaseous layers of the star. And especially if the star is large,
it will form into a black hole.
AN OBJECT FLOAT BECAUSE OF ITS LOW CAPACITY AND SINKS BECAUSE OF ITS HIGH CAPACITY