Question

A black hole…

A. is a gateway to another dimension.
B. has the gravitational pull to devour an entire galaxy.
C. cannot exist, according to the laws of physics.
D. has an escape velocity of the speed of light or greater.

Answer 1

We are going to leave the quantum theory of gravitation and return to Einstein's general relativity to describe those very exotic objects that so appeal to the imagination of young people, black holes. They are objects whose gravitational attraction is so great that not even light can escape from their surface. We already know what the escape velocity is, so what we mean is that, when we calculate the escape velocity in a black hole (see the end of Topic 1) we get a value of 300,000 km/s or more.

Step-by-step explanation:

Answer 2

D

Step-by-step explanation:

A black hole is not a gateway to another dimension.

It is impossible for a blackhole to devour an entire galaxy.

Black holes do exist.

Therefore, the answer is D.