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Intro to Astronomy: Please CONCISELY answer these questions, thank you! 1.) Suppose the amount of mass in a...

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Physics

Intro to Astronomy:

Please CONCISELY answer these questions, thankyou!

1.) Suppose the amount of mass in a black hole doubles,does the event horizon change? If so, does it grow, shrink, or staythe same size? And what physical force limits the growth ofsupermassive black holes?

2.) Assume that the distance from one edge of the MilkyWay Galaxy to the other is 1 cm, with this same scale how far awayis the Andromeda Galaxy? Why do astronomers believe thatgravitation in the universe is dominated by darkmatter?

3.)Consider a stellar black hole that used to be a 100solar mass main sequence star and a planet orbiting around it at 10AU. From the planet's position (pretend it survived the Type 2supernova), was the star or black hole a stronger gravitationalobject?

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