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

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Is there a gradient at which bicycles become less efficient than walking?

340 upvotes

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If you could fill a 1-mile deep x 1-mile wide hole with Osmium (~4x as dense as Earth) would this noticeably increase gravity on that area?

16 upvotes

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Is Musk's Hyperloop feasible? Is there enough info to evaluate it?

2 upvotes

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Why is Newtonian gravity (objects attract) still taught in school when Relativity (objects warp spacetime and move on those curves) disproved it?

1 upvotes

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Why do a human muscles atrophy with little use but a Lion's do not?

1 upvotes

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What is the biggest horizontal distance a curve ball could possibly travel from a pitcher's mound to the plate?

1 upvotes

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How did they know space was cold?

1 upvotes

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What is this bug? (picture inside)

0 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is there a gradient at which bicycles become less efficient than walking?	340
If you could fill a 1-mile deep x 1-mile wide hole with Osmium (~4x as dense as Earth) would this noticeably increase gravity on that area?	16
Is Musk's Hyperloop feasible? Is there enough info to evaluate it?	2
Why is Newtonian gravity (objects attract) still taught in school when Relativity (objects warp spacetime and move on those curves) disproved it?	1
Why do a human muscles atrophy with little use but a Lion's do not?	1
What is the biggest horizontal distance a curve ball could possibly travel from a pitcher's mound to the plate?	1
How did they know space was cold?	1
What is this bug? (picture inside)	0