Bonus
Because of extraneous processes such as “flip-flops,” one form of this process always occurs at a faster rate than another. For 10 points each:
[10m] Name this process that describes how long it takes for the energy from an absorbed radiofrequency pulse to dissipate. This process comes in “T1” and “T2” types.
ANSWER: relaxation time [accept T1 relaxation or T2 relaxation]
[10e] Relaxation time is a property commonly measured when using this technique that uses a B-field to align spins in a molecule. MRI is based on this technique that typically involves either protons or carbon-13.
ANSWER: NMR spectroscopy [or nuclear magnetic resonance spectroscopy]
[10h] T1 and T2 relaxations are sometimes given two names describing their energy interactions, one of which causes demagnetization in the longitudinal z-axis and the other of which causes demagnetization in the transverse xy-plane. Name either.
ANSWER: spin–lattice relaxation OR spin–spin relaxation [reject answers that mention “splitting” or “coupling”]
<Manchester, Chemistry>
| Editions | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|
| 1 | 29 | 12.41 | 69% | 48% | 7% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| ASU | Texas A | 10 | 10 | 0 | 20 | ME |
| Alabama A | Tennessee A | 0 | 0 | 0 | 0 | |
| Cambridge B | Bristol | 0 | 10 | 0 | 10 | E |
| Chicago A | Illinois B | 10 | 10 | 10 | 30 | MEH |
| Chicago C | WashU B | 0 | 10 | 0 | 10 | E |
| Claremont A | UCLA | 10 | 10 | 0 | 20 | ME |
| Florida A | UCF B | 10 | 10 | 0 | 20 | ME |
| Florida B | Florida State A | 10 | 10 | 0 | 20 | ME |
| Georgetown A | Notre Dame C | 0 | 0 | 0 | 0 | |
| Georgia Tech D | Bruin A | 0 | 10 | 0 | 10 | E |
| Illinois A | Illinois C | 10 | 10 | 0 | 20 | ME |
| Imperial B | Cambridge D | 10 | 10 | 0 | 20 | ME |
| Indiana A | Missouri S&T | 10 | 10 | 0 | 20 | ME |
| Iowa | Georgetown B | 0 | 0 | 0 | 0 | |
| Louisville A | Georgia Tech B | 0 | 0 | 0 | 0 | |
| Missouri | Indiana B | 0 | 10 | 0 | 10 | E |
| Northwestern A | Northwestern B | 10 | 10 | 10 | 30 | MEH |
| Notre Dame A | Purdue | 0 | 10 | 0 | 10 | E |
| Notre Dame B | Stanford B | 0 | 0 | 0 | 0 | |
| Oxford A | LSE | 10 | 10 | 0 | 20 | ME |
| Oxford C | Sheffield | 0 | 0 | 0 | 0 | |
| TAMU | Texas B | 0 | 0 | 0 | 0 | |
| UC Berkeley A | Claremont B | 10 | 10 | 0 | 20 | ME |
| UC Berkeley B | UCSD | 10 | 10 | 0 | 20 | ME |
| UW A | Alberta | 10 | 10 | 0 | 20 | ME |
| UW B | UBC | 0 | 0 | 0 | 0 | |
| Valencia A | UCF C | 0 | 0 | 0 | 0 | |
| Warwick B | Southampton A | 0 | 10 | 0 | 10 | E |
| WashU A | Chicago B | 10 | 10 | 0 | 20 | ME |
Summary
| Tournament | Edition | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|
| California | 2025-02-01 | 3 | 20.00 | 100% | 100% | 0% |
| Florida | 2025-02-01 | 3 | 13.33 | 67% | 67% | 0% |
| Midwest | 2025-02-01 | 6 | 18.33 | 100% | 67% | 17% |
| Overflow | 2025-02-01 | 5 | 8.00 | 40% | 20% | 20% |
| Pacific Northwest | 2025-02-01 | 2 | 10.00 | 50% | 50% | 0% |
| South Central | 2025-02-01 | 2 | 10.00 | 50% | 50% | 0% |
| Southeast | 2025-02-01 | 3 | 3.33 | 33% | 0% | 0% |
| UK | 2025-02-01 | 5 | 12.00 | 80% | 40% | 0% |