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

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I think I understand the difference between aleph-null and aleph-one as countable and uncountable infinities, but what is aleph-two?

30 upvotes

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Why does a spinning metal object reflect light the same way as a stationary metal object?

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If you had a large metal block strapped underneath you as you fell off a building, how would your odds of survival change? What's the smallest block you can have underneath you to survive a 10 story fall?

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Are North and South just geographical conventions, or is there a scientific definition for what is north and what is south?

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How do the American continents affect the climate of the Old World? To put it another way, if for some reason it was impossible for humans to reach the Americas, would we be able to deduce anything about the continents based on weather patterns alone?

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Why is Earth 70% water? Why not 60% or 80%?

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What, physiologically and biologically, makes chicken muscles different from cow muscles that makes one more porous than the other and thus more prone to bacteria if left on a counter and why?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
I think I understand the difference between aleph-null and aleph-one as countable and uncountable infinities, but what is aleph-two?	30
Why does a spinning metal object reflect light the same way as a stationary metal object?	1
If you had a large metal block strapped underneath you as you fell off a building, how would your odds of survival change? What's the smallest block you can have underneath you to survive a 10 story fall?	1
Are North and South just geographical conventions, or is there a scientific definition for what is north and what is south?	1
How do the American continents affect the climate of the Old World? To put it another way, if for some reason it was impossible for humans to reach the Americas, would we be able to deduce anything about the continents based on weather patterns alone?	1
Why is Earth 70% water? Why not 60% or 80%?	1
What, physiologically and biologically, makes chicken muscles different from cow muscles that makes one more porous than the other and thus more prone to bacteria if left on a counter and why?	1