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

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A question about Santa and relativity

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If everything in space is constantly in motion at different speeds, how is it that we're able to measure the exact length of a year down to the second?

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If black holes have such great gravity, is the temperature at the center of a black hole at absolute zero, because the gravity is too great for the subatomic particles to move? If so, where does all that energy go?

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Is it accurate to blame extremely unseasonal weather on climate change?

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Assuming it was legal and money was no issue, how much of a person's body could theoretically be replaced by high-tech machinery with today's technology without them dying or being confined to one place?

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Why do so many animals from the sea have blue blood, but basically every animal on land has red blood?

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Can a tesseract tile in 4 dimensions?

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Why does caffeine make some people wired and jittery but it doesn't affect others hardly at all?

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What would happen if all the energy of a nuclear bomb blast was contained to a 1-foot spherical area?

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If you had a closed (sealed) tank completely full of water with a fish inside, and you put it in a car and accelerated quickly, what would the fish experience? Would it move forward or backward? Would it feel the acceleration like a person sitting in the car would?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
A question about Santa and relativity	1
If everything in space is constantly in motion at different speeds, how is it that we're able to measure the exact length of a year down to the second?	1
If black holes have such great gravity, is the temperature at the center of a black hole at absolute zero, because the gravity is too great for the subatomic particles to move? If so, where does all that energy go?	1
Is it accurate to blame extremely unseasonal weather on climate change?	1
Assuming it was legal and money was no issue, how much of a person's body could theoretically be replaced by high-tech machinery with today's technology without them dying or being confined to one place?	1
Why do so many animals from the sea have blue blood, but basically every animal on land has red blood?	1
Can a tesseract tile in 4 dimensions?	1
Why does caffeine make some people wired and jittery but it doesn't affect others hardly at all?	1
What would happen if all the energy of a nuclear bomb blast was contained to a 1-foot spherical area?	1
If you had a closed (sealed) tank completely full of water with a fish inside, and you put it in a car and accelerated quickly, what would the fish experience? Would it move forward or backward? Would it feel the acceleration like a person sitting in the car would?	1