1. Physics and Astronomy. Please provide complete and correct solution done on c
ID: 1837141 • Letter: 1
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1. Physics and Astronomy. Please provide complete and correct solution done on computer or by hand. Please, emphasis on correct solution. This is all the information provided. Thank you very much.
Useful quantities: Distance to the Andromeda galaxy: 800 kpc Parsec: 1 pc 3 1013 km. A. Multiple-choice questions 12pt for correct answer; no explanation needed] 1. Which type of galaxies hosts a supermassive black hole in their center? a. Spiral galaxies b. Elliptical galaxies c. Irregular galaxies d. Only a small subset of galaxies, irrespective of their morphological type e. All galaxies 2. Who first discovered the expansion of the Universe? a. Isaac Newton b. Albert Einstein c. Georges Lemaitre d. Edwin Hubble e. Vesto Slipher 3. Which of the following components of our Milky Way contains the most mass? a. Dark Matter b. Stars and gas in the halo c. Stars and gas in the disk d. The supermassive black hole 4. Which is the closest supermassive black hole from the Sun? a. Cyg X-1 b. Sgr A* c. The black hole at the center of the Andromeda galaxy d. The M87 Active Galactic Nucleus 5. How was Dark Matter first discovered? a. Through unexplained absorption features in the spectra of globular clusters b. Through unexpected motions of objects in the Solar System c. Through strong gravitational lensing effects of distant galaxies d. Through the rotation of stars and gas around the Galaxy that did not obey the expected behaviorExplanation / Answer
1.A) because almost all known galaxy are known to have supermassive black hole at their centre.
2)Edwin Hubble made the discovery first in 1935.
3)Scientist theorise that most matter in our galaxy is dark matter
4)Sgr A* at the centre of milky way is the closest.
5) D) because the the total kinetic energy is much greater than expected.
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