Question
This stroke of an Otto cycle is enabled by a manifold that generates a partial vacuum. For 10 points each:
[10m] What stroke of a four-stroke Otto cycle directly follows the exhaust stroke and precedes the compression stroke?
ANSWER: intake stroke [accept intake manifold; prompt on, but DO NOT REVEAL, isobaric expansion or expanding isobarically or isobaric stroke]
[10e] In the Otto cycle, the intake stroke approximately has this property of occurring at constant pressure.
ANSWER: isobaric [accept isobaric process]
[10h] The intake valve remains open until partway into the compression stroke in this non-supercharged cycle, which has higher efficiency than the Otto cycle but creates less power. A century after its invention, this cycle rose to prominence due to its use in hybrids like the Toyota Prius.
ANSWER: Atkinson cycle
<Physics>
Data
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total |
|---|---|---|---|---|---|
| Berkeley A | Iowa State | 0 | 10 | 0 | 10 |
| Chicago B | Chicago A | 10 | 10 | 0 | 20 |
| Columbia A | Stanford | 10 | 10 | 0 | 20 |
| Cornell A | North Carolina A | 0 | 10 | 0 | 10 |
| Illinois | Northwestern | 10 | 10 | 0 | 20 |
| Indiana | Texas | 10 | 10 | 0 | 20 |
| Johns Hopkins | Brown | 10 | 10 | 0 | 20 |
| Michigan | Maryland | 0 | 10 | 0 | 10 |
| North Carolina A | Chicago B | 10 | 10 | 10 | 30 |
| Purdue | Waterloo | 0 | 10 | 0 | 10 |
| WUSTL A | Minnesota A | 0 | 10 | 0 | 10 |
| Yale A | NYU | 0 | 10 | 0 | 10 |
| Yale B | Toronto B | 0 | 10 | 0 | 10 |
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2024 ACF Nationals | 04/21/2024 | Y | 13 | 15.38 | 100% | 46% | 8% |