Take two identical, nonrotating, 5-solar-mass black holes and place them side by side. Add 1 solar mass of pineapples to the left-hand one and 1 solar mass of uranium to the right-hand one (without changing the electrical charge or the rotation of either black hole). How will the two black holes differ?
A) The right-hand black hole will have a stronger gravitational field because of the denser material inside it.
B) The two black holes will not differ at all.
C) The left-hand black hole will smell better.
D) The right-hand black hole will be radioactive, emitting alpha particles, electrons, and gamma rays into space.

Question

Quizplus · Accepted Answer

Once matter falls into a black hole, it no longer retains any of its previous properties except for mass, charge, and angular momentum. The type of matter (pineapples or uranium) doesn't affect the black hole's observable characteristics, so the two black holes will not differ in any measurable way.

Take Two Identical, Nonrotating, 5-Solar-Mass Black Holes and Place Them