I want to do a science fair project on black holes. I have formulas to find the radius of the event horizon, the temp., the mass of the radiation, the luminosity, its loss of mass, and the final lifetime of it. But I want to know:
1: How do you find the mass of the black hole?
2a: Which types of stars collapse into black holes?
b: Is there a formula to figure out which stars will collapse into a black hole?
3: Also any other info that could help, and generally with science fair.
FYI, I am a highschool sophomore so you don't need to dumb it down, and the competition is called "ISEF". Thank-you.