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

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If water boils away instantly in the vacuum of space, how did ice comets and the like form?

29 upvotes

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Why exactly does water put out fire so effectively? Both oxygen and hydrogen merrily burn, so why is the combination of the two such a great anti-fire agent, from a physics standpoint?

27 upvotes

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Tissue rejection in the case of limb/organ transplants. Can someone explain to me how tissue rejection is overcome, ultimately, in the case of transplants? Do they take anti-rejection drugs forever? Does the transplanted limb or organ ever become genetically identical to the recipient's?

11 upvotes

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If geological activity (volcanoes and earthquakes) stopped right now, would erosion eventually render all the Earth's lands into a featureless plain? If so, how long would it take?

6 upvotes

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To our knowledge, is there anything mathematics can't describe or model?

5 upvotes

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Are there any nuclear fusion processes that don't give off excess energy?

3 upvotes

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Is there a known phenomenon that creates this sort of cloud pattern?

2 upvotes

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If only one object existed in the universe, would it have a gravitational pull?

2 upvotes

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Gravity travels at the speed of light. Are gravitational interactions halved because both masses are 'sending out' gravity and they meet in the middle? Or does gravitational interaction still only happen at C?

1 upvotes

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Could heavy elementary particles have existed in the early moments of the universe (which are unknown to science) which have decayed into the elementary particles we know of today - protons/neutrons/electrons/photons, etc?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If water boils away instantly in the vacuum of space, how did ice comets and the like form?	29
Why exactly does water put out fire so effectively? Both oxygen and hydrogen merrily burn, so why is the combination of the two such a great anti-fire agent, from a physics standpoint?	27
Tissue rejection in the case of limb/organ transplants. Can someone explain to me how tissue rejection is overcome, ultimately, in the case of transplants? Do they take anti-rejection drugs forever? Does the transplanted limb or organ ever become genetically identical to the recipient's?	11
If geological activity (volcanoes and earthquakes) stopped right now, would erosion eventually render all the Earth's lands into a featureless plain? If so, how long would it take?	6
To our knowledge, is there anything mathematics can't describe or model?	5
Are there any nuclear fusion processes that don't give off excess energy?	3
Is there a known phenomenon that creates this sort of cloud pattern?	2
If only one object existed in the universe, would it have a gravitational pull?	2
Gravity travels at the speed of light. Are gravitational interactions halved because both masses are 'sending out' gravity and they meet in the middle? Or does gravitational interaction still only happen at C?	1
Could heavy elementary particles have existed in the early moments of the universe (which are unknown to science) which have decayed into the elementary particles we know of today - protons/neutrons/electrons/photons, etc?	1