Activity for roseannadu‭

Type	On...	Excerpt	Status	Date
Answer	—	A: Why would merfolk have hair? If the merpeople's babies are relatively helpless or start as weak swimmers, head hair could remain as a useful point for the young to cling to as the adult swims around, keeping its arms free. This would be analogous to other ape young which cling to their mother's body. For the purposes of worldbu... (more)	—	almost 8 years ago
Question	—	How fast must a planet with 1.27g spin to allow for space elevators? Obviously the greater a planet's gravity, the stronger the material of the space elevator's cable would need to be in order to support its own weight. However, doesn't greater rotation speed reduce an elevator's required length by increasing centrifugal force? Absolutely massive super-Earths are pro... (more)	—	over 9 years ago