Black holes result from

Most black holes form from the remnants of a large star that dies in a supernova explosion.

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

The duration of a photographic flash is related to an rc time constantly