Question
A large value of this quantity’s “peculiar” form is responsible for a distortion known as the “Fingers of God” effect. For 10 points each:
[10h] Identify this quantity. The Faber–Jackson relation states that the luminosity of an elliptical galaxy is proportional to the fourth power of this quantity’s dispersion.
ANSWER: velocity [accept velocity dispersion or peculiar velocity]
[10e] Unlike the Faber–Jackson relation, the M–sigma relation concerns stars’ velocity as they orbit a galaxy with a supermassive one of these bodies in the center. These bodies allow no light to escape inside their event horizon.
ANSWER: black holes [accept supermassive black holes]
[10m] Vera Rubin’s observation of stellar velocity remaining constant with respect to distance in galaxies led her to hypothesize the existence of this substance. About 27% of the universe’s mass-energy is this substance.
ANSWER: dark matter [reject “dark energy”]
<Other Science>
Summary
| 2024 ACF Fall at Cornell | fall | Y | 9 | 20.00 | 100% | 100% | 0% |
| 2024 ACF Fall at Ohio State | fall | Y | 8 | 18.75 | 88% | 88% | 13% |
| 2024 ACF Fall at Washington | fall | Y | 7 | 20.00 | 100% | 86% | 14% |
| 2024 ACF Fall at Georgia | fall | Y | 14 | 20.71 | 100% | 100% | 7% |
| 2024 ACF Fall at North Carolina | fall | Y | 9 | 18.89 | 100% | 89% | 0% |
| 2024 ACF Fall at Claremont Colleges | fall | Y | 1 | 20.00 | 100% | 100% | 0% |
| 2024 ACF Fall at Rutgers | fall | Y | 7 | 22.86 | 100% | 100% | 29% |
| 2024 ACF Fall at Illinois | fall | Y | 9 | 22.22 | 100% | 100% | 22% |
Data
| Purdue A | Chicago A | 10 | 10 | 10 | 30 |
| Notre Dame A | Chicago B | 10 | 10 | 10 | 30 |
| Illinois A | Notre Dame C | 0 | 10 | 10 | 20 |
| Iowa A | Illinois C | 0 | 10 | 10 | 20 |
| Iowa B | Illinois B | 0 | 10 | 10 | 20 |
| Indiana | Northwestern A | 0 | 10 | 10 | 20 |
| Purdue C | Notre Dame B | 0 | 10 | 10 | 20 |
| Northwestern B | SIUE | 0 | 10 | 10 | 20 |
| Illinois D | WashU A | 0 | 10 | 10 | 20 |