Question
This man commuted 150 miles round-trip every week between Yerkes Observatory and the University of Chicago to teach a single class with just 2 students: T.D. Lee and C.N. Yang, who went on to win the Nobel Prize in Physics in 1957. For 10 points each:
[10m] Name this scientist who developed a tensor version of the virial theorem. Along with Hubble, Spitzer, and Compton, this scientist names one of NASA's four “Great Observatories.”
ANSWER: Subrahmanyan Chandrasekhar
[10h] Chandrasekhar derived the first formula for this phenomenon, in which a large object moving quickly through a region with many other masses experiences braking forces and loses orbital energy.
ANSWER: dynamical friction [or Chandrasekhar friction; prompt on friction]
[10e] Dynamical friction is a driver of the early phase of these events. The Milky Way and Andromeda are predicted to undergo one of these events in about 4.5 billion years.
ANSWER: galaxy mergers [or galaxy collisions]
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Summary
| 2023 BHSU @ Berkeley | 03/18/2023 | Y | 3 | 13.33 | 100% | 33% | 0% |
| 2023 BHSU @ Maryland | 03/11/2023 | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 BHSU @ Northwestern | 02/25/2023 | Y | 6 | 16.67 | 100% | 50% | 17% |
| 2023 BHSU Online | 04/15/2023 | Y | 4 | 15.00 | 100% | 50% | 0% |
| 2023 BHSU @ Sheffield | 04/15/2023 | Y | 2 | 10.00 | 100% | 0% | 0% |
| 2023 BHSU @ Waterloo | 04/15/2023 | Y | 3 | 10.00 | 100% | 0% | 0% |
Data
| Buzzers Karamazov | Broken Imperial Nomads | 0 | 0 | 10 | 10 |
| Oxford Hornets | Magisters Ludi | 0 | 0 | 10 | 10 |