{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# x2samp - Astro 250 practice Exam 1 page 1 Astro 250...

This preview shows pages 1–2. Sign up to view the full content.

ASTRO 250 -- EXAM 2 (sample) This exam has two parts. In Part I , indicate the best answer to the question directly on the question sheet. In Part II , write your answer in the space provided. Partial credit will be given if it looks like you are on the right track, or if you have the basic idea but do not give sufficient detail. Note that the sum of total possible points is 102. GOOD LUCK --- and RTFQ USEFUL FORMULAE V=H o d ! =rho/rho-crit t " 2/(3Ho) #\$ / \$ = v/c Z = \$ observed / \$ emitted –1 E=mc 2 c =3x10 10 cm/s 1 Mpc = 10 6 pc = 3x10 5 km/s PART I: MULTIPLE CHOICE: 22 questions, 3 points each. Select the best answer to each of the questions below. Indicate your answer on this sheet. 1. The giant galaxy M87 is 3 times farther away than the spiral galaxy M51. The velocity of M87 will be ___________ times ___________ than the velocity of Galaxy B with respect to the Milky Way. a) 3 ; smaller b) 3 ; bigger c) 9 ; smaller d) 9 ; bigger e) none of the above 2. Most of the matter of the universe is 3. The diameter of the disk of our galaxy is closest to _____ parsec(s), or about _____ light years. 4. If the density of the universe is less than the critical density the universe will Astro 250 - practice Exam 1 page 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern