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

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Why is there a critical point between liquids and gases but not between solids and liquids?

534 upvotes

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What is it about jet engines that makes them so loud?

90 upvotes

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Why can we take the square root of a negative number, which is nonsensical, and call it a "complex number," but we can't represent a division by zero, a similarly nonsense operation, with some other type of number?

88 upvotes

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Considering the enormous amount of energy produced by the merger of a pair of stellar-mass black holes, what kind of energy output could be expected from the merger of two supermassive black holes, and what effects would that have on the dense stellar environment of the galactic center?

24 upvotes

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Why do some plants have colorful (not green) leaves in the spring and summer and not just in the fall?

9 upvotes

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If fluorine is bound into a diatomic molecule in which the octet rule is satisfied, then why is it still unstable to the point in which it violently reacts with just about anything else?

8 upvotes

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Why is it that the Cassini probe is being crashed into Saturn to avoid possible biological contamination, while Huygens was landed on its surface without concern?

5 upvotes

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Why isn't siberia a giant desert?

4 upvotes

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How exactly does fracking cause earthquakes?

3 upvotes

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Given that both the global sea level and the top of mount Everest are rising, will Everest's actual height above sea level increase or decrease over the next century or more?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why is there a critical point between liquids and gases but not between solids and liquids?	534
What is it about jet engines that makes them so loud?	90
Why can we take the square root of a negative number, which is nonsensical, and call it a "complex number," but we can't represent a division by zero, a similarly nonsense operation, with some other type of number?	88
Considering the enormous amount of energy produced by the merger of a pair of stellar-mass black holes, what kind of energy output could be expected from the merger of two supermassive black holes, and what effects would that have on the dense stellar environment of the galactic center?	24
Why do some plants have colorful (not green) leaves in the spring and summer and not just in the fall?	9
If fluorine is bound into a diatomic molecule in which the octet rule is satisfied, then why is it still unstable to the point in which it violently reacts with just about anything else?	8
Why is it that the Cassini probe is being crashed into Saturn to avoid possible biological contamination, while Huygens was landed on its surface without concern?	5
Why isn't siberia a giant desert?	4
How exactly does fracking cause earthquakes?	3
Given that both the global sea level and the top of mount Everest are rising, will Everest's actual height above sea level increase or decrease over the next century or more?	1