Bonus
In a paper about exchange effects in this isotope’s body-centered cubic solid phase, J. H. Hetherington added his cat as a coauthor under the pen name F. D. C. Willard. For 10 points each:
[10m] Name this lighter of the two isotopes used in a standard dilution refrigerator. Tritium undergoes beta-minus decay to generate this isotope.
ANSWER: helium-3 [or He-3; prompt on helium or He]
[10e] Because helium-3 atoms are fermions, they do not readily exhibit this low-temperature property in which a substance exhibits zero viscosity.
ANSWER: superfluidity [or word forms]
[10h] With Ginzburg and Leggett, this physicist won the 2003 Nobel Prize for theories on superfluid helium-3. This Russian physicist and Khalatnikov expanded Landau’s theory of Fermi liquids to model low-temperature helium-3.
ANSWER: Alexei Abrikosov
<MY, Physics>
| Editions | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|
| 1 | 62 | 11.13 | 90% | 16% | 5% |
Conversion
Summary
| Tournament | Edition | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|
| Florida | 2025-02-01 | 2 | 15.00 | 100% | 50% | 0% |
| Great Lakes | 2025-02-01 | 6 | 10.00 | 100% | 0% | 0% |
| Lower Mid-Atlantic | 2025-02-01 | 6 | 8.33 | 83% | 0% | 0% |
| Midwest | 2025-02-01 | 6 | 13.33 | 100% | 33% | 0% |
| North | 2025-02-01 | 3 | 16.67 | 100% | 33% | 33% |
| Northeast | 2025-02-01 | 5 | 14.00 | 80% | 40% | 20% |
| Overflow | 2025-02-01 | 5 | 12.00 | 100% | 20% | 0% |
| Pacific Northwest | 2025-02-01 | 2 | 10.00 | 100% | 0% | 0% |
| South Central | 2025-02-01 | 2 | 10.00 | 100% | 0% | 0% |
| Southeast | 2025-02-01 | 4 | 7.50 | 75% | 0% | 0% |
| UK | 2025-02-01 | 10 | 11.00 | 90% | 20% | 0% |
| Upper Mid-Atlantic | 2025-02-01 | 8 | 11.25 | 88% | 13% | 13% |
| Upstate NY | 2025-02-01 | 3 | 6.67 | 67% | 0% | 0% |