Activity for Caridorcâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Solar powered plane without batteries Could an unmanned solar plane go not only above the clouds, but also so fast that it always is in the day-side of the planet? A solar plane flying above the clouds receives sunlight $12$ hours per day, but there is a need for batteries to fly in the night. Such plane could fly continuously for decad... (more) |
— | about 8 years ago |
| Question | — |
Given a billion dollars, build the most visible orbiting satellite possible As per the title, given A billion ($10^9$) dollars. Present day technology. A year of time (including making projects and testing), (preferred, not compulsory) No restriction about maximal nor minimal size of the object nor its orbiting altitude. Build and put into orbit a satellite that will hav... (more) |
— | about 8 years ago |
| Question | — |
Quasi-creature plants What is a quasi-creature plant? I define a quasi-creature plant as an organism that lives only through photosynthesis that moves with a speed in the same order of magnitude of that of an animal. Here on Earth, almost nothing On Earth almost all plants move very slowly, orders of magnitude more slo... (more) |
— | almost 9 years ago |