Question
The Oh-My-God particle, an ultra-high-energy cosmic ray detected in 1991, had an estimated energy of 320 exa-[this unit]. For 10 points each:
[10m] 13.6 of what unit is the energy needed to ionize a hydrogen atom? A hartree is equal to 27.2 of this unit.
ANSWER: electronvolt [or electron volts; or eV; reject “electron” or “volt”]
[10e] The ionization energy of hydrogen being equal to 13.6 electronvolts is determined using this Danish physicist’s model of the atom, which puts electrons in discrete orbitals.
ANSWER: Niels Bohr
[10h] The hydrogen atom’s radial eigenfunctions are this set of orthogonal polynomials named for a Frenchman. They are solutions of the equation [read slowly] “x times y-double-prime, plus one-minus-x times y-prime, plus ny equals zero.”
ANSWER: Laguerre polynomials
<Physics>
Summary
| 2024 ACF Winter at Clemson | 2024-11-16 | Y | 1 | 10.00 | 100% | 0% | 0% |
| 2024 ACF Winter at Lehigh | 2024-11-16 | Y | 6 | 13.33 | 100% | 17% | 17% |
| 2024 ACF Winter at Northwestern | 2024-11-16 | Y | 9 | 21.11 | 100% | 78% | 33% |
| 2024 ACF Winter at Ohio State | 2024-11-16 | Y | 7 | 18.57 | 100% | 71% | 14% |
| 2024 ACF Winter at Online | 2024-11-16 | Y | 8 | 12.50 | 100% | 25% | 0% |
| 2024 ACF Winter at UBC | 2024-11-16 | Y | 3 | 20.00 | 100% | 100% | 0% |
| 2024 ACF Winter at Central Florida | 2024-11-16 | Y | 5 | 14.00 | 80% | 60% | 0% |
Data
| Central Oklahoma | NYU B | 10 | 10 | 0 | 20 |
| Mississippi State | Oregon State | 0 | 10 | 0 | 10 |
| NYU A | Missouri | 0 | 10 | 0 | 10 |
| Iowa | Texas A | 0 | 10 | 0 | 10 |
| Colorado College | Texas D | 0 | 10 | 0 | 10 |
| Texas B | Vassar A | 0 | 10 | 0 | 10 |
| Vassar B | Texas C | 0 | 10 | 0 | 10 |
| WUSTL A | McGill E | 10 | 10 | 0 | 20 |