Packet 6: Bonus 18
Overlapping “zones of protection” are used by relays, a type of protective device in these systems. For 10 points each:
[10h] Name these systems, some of which in North America are known as interconnections. America’s three-phase examples of these systems normally operate at 60 Hertz.
ANSWER: power grids [or electrical grids or energy grids or power transmission grids; prompt on grids; prompt on power distribution networks]
[10e] The American three-phase power grids use this type of power contrasted with direct current.
ANSWER: alternating current [or AC]
[10m] Power grid substations can connect high voltage transmission and low voltage distribution networks using many of these devices to “step up” and “step down” voltages.
ANSWER: transformers [accept distribution transformer or service transformer]
<Other Science — Sam Macchi> | SHOW-ME Four Packet 6
| Heard | PPB | E % | M % | H % |
|---|---|---|---|---|
| 23 | 16.52 | 87% | 65% | 13% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| Harpeth Hall | Owensboro | 0 | 10 | 0 | 10 | E |
| Merrol Hyde A | Merrol Hyde B | 0 | 10 | 10 | 20 | EM |
| USN A | USN C | 0 | 10 | 10 | 20 | EM |
Summary
| Tournament | Edition | Match | Heard | PPB | E % | M % | H % |
|---|---|---|---|---|---|---|---|
| Rube Goldberg XIX | 11/20/2025 | ✓ | 15 | 15.33 | 80% | 53% | 20% |
| SHOW-ME Four Nationwide HS | 11/20/2025 | ✓ | 5 | 20.00 | 100% | 100% | 0% |
| SPOOKY IX | 11/20/2025 | ✓ | 3 | 16.67 | 100% | 67% | 0% |