/u/willardTheMighty's posts in /r/askscience

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If two planes pass above me at the exact same instant, one travelling at Mach 2 and the other travelling at Mach 8, will I hear them at the same time?

2328 upvotes

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Transplant a human newborn from X kya into modern society. What is the largest value of X such that the newborn will have no problems developing into a normal member of society?

1 upvotes

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If a fission bomb is detonated in an area, how long until it is safe for a human to enter the area?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If two planes pass above me at the exact same instant, one travelling at Mach 2 and the other travelling at Mach 8, will I hear them at the same time?	2328
Transplant a human newborn from X kya into modern society. What is the largest value of X such that the newborn will have no problems developing into a normal member of society?	1
If a fission bomb is detonated in an area, how long until it is safe for a human to enter the area?	1