In Exercise 37, what would be the escape speed at a distance of two Schwarzschild radii from the center of the “black hole” Sun? Compare your answer to the actual escape speed at a distance of twice the real Sun’s radius from its center.
In exercise
If the Sun became a black hole, what would be its average density, assuming it to be a sphere with a radius equal to the Sun’s Schwarzschild radius? Compare your answer to the actual average density of the Sun.