Describing black coles
Why can't astronomers take a picture of a black hole?

-Gravity is so strong that even light cannot escape a black hole.

-The nearest black hole is too far away to be seen.

-There is no way to detect the locations of black holes.

-Black holes are too large to photograph.

Which is mostly likely why many scientists reject the cold fusion theory

The identities of substances are the same before and after which type of change

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?