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

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[PHYSICS] Why do batteries slowly lose capacity?

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Often radiation exposure is given as equivalent to something else (e.g. "one PET scan is equivalent to living in Denver for a year"), but is there any higher risk to getting that amount of radiation in five minutes versus a year?

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How much energy would be saved if the countries that used 110-120v mains electricity switched to 220-240v?

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Is it possible to freeze water too quickly for ice crystals for form? Or, as a restatement of the problem: if water dropped instantly from >0° C to absolute zero, since there's no molecular motion, would crystals be able to form?

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[political science/law] Does the US Secretary of State carry a passport?

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Do Zeno's paradoxes imply space is quantized?

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Would it be possible to un-fire the clathrate gun with (for lack of a better term) giant space mirrors?

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The EmDrive is almost certainly experimental error, but are there any seriously proposed physical theories (i.e. proposed by other than the drive's inventor) under which it could work? If so, what else do those theories predict?

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Heat is just the measurement of particle motion. Therefore, if something is moving fast relative to you, do you see it as hotter? Is there a brief explanation of heat in relativity?

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If particles and waves are the same thing, is it possible to focus/refract/magnify matter? If so, what would happen? What sort of "lens" would we need?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
[PHYSICS] Why do batteries slowly lose capacity?	1
Often radiation exposure is given as equivalent to something else (e.g. "one PET scan is equivalent to living in Denver for a year"), but is there any higher risk to getting that amount of radiation in five minutes versus a year?	1
How much energy would be saved if the countries that used 110-120v mains electricity switched to 220-240v?	1
Is it possible to freeze water too quickly for ice crystals for form? Or, as a restatement of the problem: if water dropped instantly from >0° C to absolute zero, since there's no molecular motion, would crystals be able to form?	1
[political science/law] Does the US Secretary of State carry a passport?	1
Do Zeno's paradoxes imply space is quantized?	1
Would it be possible to un-fire the clathrate gun with (for lack of a better term) giant space mirrors?	1
The EmDrive is almost certainly experimental error, but are there any seriously proposed physical theories (i.e. proposed by other than the drive's inventor) under which it could work? If so, what else do those theories predict?	1
Heat is just the measurement of particle motion. Therefore, if something is moving fast relative to you, do you see it as hotter? Is there a brief explanation of heat in relativity?	1
If particles and waves are the same thing, is it possible to focus/refract/magnify matter? If so, what would happen? What sort of "lens" would we need?	1