Answer:
black hole is anything but empty space. Rather, it is a great amount of matter packed into a very small area - think of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of New York City. The result is a gravitational field so strong that nothing, not even light, can escape. In recent years, NASA instruments have painted a new picture of these strange objects that are, to many, the most fascinating objects in space.
Explanation:
I have this paper :)
results in a system loss of 600 - 100 = 500 J of internal energy
Answer: 100 j of heat is added to a system that does 600 j of work