Packet 3: Bonus 17
The Woods Hole Oceanographic Institution’s EM300 multibeam system uses this phenomenon to map the seafloor. For 10 points each:
[10m] Name this phenomenon used in namesake ocean tomography arrays track changes in a quantity demonstrated using Kundt’s tube.
ANSWER: sound [or acoustics or bioacoustics; accept sonar]
[10e] Ocean acoustic tomography measures sound speed variations as a proxy for this quantity over large areas. Gradients in salinity and this quantity form a part of oceanic circulation sometimes called the global conveyor belt.
ANSWER: temperature [or sea surface temperature]
[10h] This ocean layer acts as a waveguide to transmit long-distance acoustic signals. Whale songs were behind the “Jezebel monster” that naval hydrophone arrays detected in this layer.
ANSWER: SOFAR channel [or Sound Fixing and Ranging channel; accept deep sound channel or DSC]
<Editors, Other Science> | L. Playoffs 3 (Editors 3)
| Heard | PPB | E % | M % | H % |
|---|---|---|---|---|
| 20 | 18.50 | 95% | 55% | 35% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| British Columbia | Vanderbilt | 0 | 10 | 0 | 10 | E |
| Bruin | NYU B | 0 | 10 | 0 | 10 | E |
| Chicago A | Virginia Tech | 0 | 10 | 0 | 10 | E |
| Georgetown | Purdue | 10 | 10 | 0 | 20 | ME |
| Georgia Tech B | Johns Hopkins | 0 | 10 | 0 | 10 | E |
| Illinois A | Minnesota | 0 | 10 | 0 | 10 | E |
| MIT | Cambridge | 10 | 10 | 10 | 30 | MEH |
| Maryland B | Brown | 0 | 10 | 0 | 10 | E |
| Michigan | Ohio State | 10 | 0 | 0 | 10 | M |
| Northwestern A | Harvard | 10 | 10 | 10 | 30 | MEH |
| Penn State | Georgia Tech A | 0 | 10 | 0 | 10 | E |
| Stanford A | Maryland A | 10 | 10 | 10 | 30 | MEH |
| Texas | Georgia Tech C | 0 | 10 | 10 | 20 | EH |
| Toronto A | NYU A | 10 | 10 | 10 | 30 | MEH |
| Toronto B | Pittsburgh | 10 | 10 | 0 | 20 | ME |
| UC Berkeley A | Indiana | 10 | 10 | 0 | 20 | ME |
| UC Berkeley B | Columbia A | 10 | 10 | 10 | 30 | MEH |
| Virginia | Columbia B | 10 | 10 | 0 | 20 | ME |
| WashU | UCLA | 10 | 10 | 10 | 30 | MEH |
| Waterloo | North Carolina | 0 | 10 | 0 | 10 | E |
Summary
| Tournament | Edition | Match | Heard | PPB | E % | M % | H % |
|---|---|---|---|---|---|---|---|
| Main Site | 2026-04-17 | ✓ | 20 | 18.50 | 95% | 55% | 35% |