Each of the following is a theoretical difference between a rotating and a nonrotating black hole EXCEPT ONE. Which is the exception?
A) The singularity for a nonrotating black hole is a mathematical point, whereas the singularity for a rotating black hole is a ring.
B) A nonrotating black hole has an event horizon; a rotating black hole has none.
C) It is possible to extract energy from a rotating black hole but not from a nonrotating black hole.
D) A rotating black hole has an ergoregion; a nonrotating black hole has none.
Correct Answer:
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