Activity for Nathaniel D. Hoffmanâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
How to defend against bad drivers and alien threats in a slower than light transportation scenario You don't need to be traveling faster than the speed of light to encounter some pretty major problems. At just 30% the speed of light (90 Mm/s) a spaceship of mass 4 x 10^5 kg (about the mass of the ISS) colliding with a planet would impart 1.736 x 10^21 Joules of energy (Zettajoules) accounting for... (more) |
— | over 7 years ago |