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

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Can gravitational waves be used to do spectroscopy?

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How does the phase of an emitted photoelectron depend on the phase of the incomming photons? Are they the same, or is there some kind of phase shift? What causes these phase shifts?

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Can an object have so much positive charge that an electron cannot possibly escape it? Would such an object emit Hawking radiation?

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Is it possible to build a Penrose Triangle in curved space? What kind of curvature would you need to be able to build one?

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How 'black' is a black hole?

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In an expanding universe, energy is not conserved. So, what stops me from building a perpetuum mobile?

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In honor of today's TIL post about Norwegian ore trains producing power: how much gravitational energy could we convert into power by deconstructing, say, the Alps?

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How efficient is transporting electricity by putting a battery on a truck or train vs. using long-distance power lines?

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Why are some scientific theories (e.g. MOND and Pilot Wave Theory) so much more popular among laymen than among experts? What's making fringe theories so popular?

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What's the pH of the LHC's beam?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Can gravitational waves be used to do spectroscopy?	1
How does the phase of an emitted photoelectron depend on the phase of the incomming photons? Are they the same, or is there some kind of phase shift? What causes these phase shifts?	1
Can an object have so much positive charge that an electron cannot possibly escape it? Would such an object emit Hawking radiation?	1
Is it possible to build a Penrose Triangle in curved space? What kind of curvature would you need to be able to build one?	1
How 'black' is a black hole?	1
In an expanding universe, energy is not conserved. So, what stops me from building a perpetuum mobile?	1
In honor of today's TIL post about Norwegian ore trains producing power: how much gravitational energy could we convert into power by deconstructing, say, the Alps?	1
How efficient is transporting electricity by putting a battery on a truck or train vs. using long-distance power lines?	1
Why are some scientific theories (e.g. MOND and Pilot Wave Theory) so much more popular among laymen than among experts? What's making fringe theories so popular?	1
What's the pH of the LHC's beam?	0