Activity for AJMansfieldâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
There's no oil in space? On earth, all sorts of machines require heavy oils and lubricants in order to function correctly, be it bearing grease, engine oil, transmission fluid or hydraulic oil, the majority of which are produced from heavy petroleum fractions. Most plastics, such as polyethylene, ABS, or PVC, are synthesize... (more) |
— | about 6 years ago |
| Question | — |
Electrical grid based on devices in series using constant currents, not devices in parallel using constant voltages Mains power electrical systems on Earth supply a fixed standardized voltage to a number of devices, which are all wired in parallel with each other. However, on the planet I'm writng about, they do it the other way around: instead of getting a fixed voltage, their mains power grid supplies a fixed c... (more) |
— | about 6 years ago |