Mark Beadles

1,494 reputation

515

bio	website	markbeadles.com
	location	Columbus, OH
	age	46
visits	member for	1 year, 8 months
	seen	Jan 28 at 17:55
stats	profile views	189

	1,494 reputation	bio	website	markbeadles.com	visits	member for	1 year, 8 months
515 badges		location	Columbus, OH		seen	Jan 28 at 17:55

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Feb 15	comment	17 Joules of Energy From a Mouse Trap I was going to make this a joke comment but then I realized that it's an answer :)
Feb 15	answered	17 Joules of Energy From a Mouse Trap
Feb 13	revised	If an anti-matter singularity and a normal matter singularity, of equal masses, collided would we (outside the event horizon) see an explosion? deleted 2 characters in body
Feb 13	comment	If an anti-matter singularity and a normal matter singularity, of equal masses, collided would we (outside the event horizon) see an explosion? This is fair enough, I will edit my answer. Thanks.
Feb 12	answered	If an anti-matter singularity and a normal matter singularity, of equal masses, collided would we (outside the event horizon) see an explosion?
Feb 9	comment	units and nature What you are saying, @RonMaimon, is that basically all the units are like the candela. They're just there to make things convenient for human experience.
Feb 9	answered	units and nature
Feb 4	answered	Physically what happens during Avalanche breakdown to the pn junction?
Feb 4	answered	Physics of the Internet?
Feb 4	comment	Physics of the Internet? This user's profile indicates he is a HS student. I am willing to give him the benefit of the doubt.
Feb 2	answered	Are matrices and second rank tensors the same thing?
Feb 2	comment	Energy required to reach 1 wavelength Thanks, @Community♦ for catching my error in the sign of the exponent.
Feb 2	comment	Energy required to reach 1 wavelength As @Martin alludes to above, it's not correct to think of photons as "using" or "needing" energy to travel. They always travel; that's what they do, and always at the speed of light. A photon doesn't need to "reach" a frequency: when it is emitted, it already has that frequency. It's not like a mechanical wave. Photons essentially are energy. And absent hitting something, a photon will keep travelling to infinity.
Feb 1	answered	Energy required to reach 1 wavelength
Jan 31	comment	What experiment would disprove string theory? I like the metaphor of the extension of the positive integers to the signed integers as a model for the extension of relativity+quantum theory to string theory. But I think a better metaphor is the extension of Euclid's axioms. It turned out there were multiple consistent (even "correct") extensions of the axioms. But of course, only one extension is "true" (or "real) for any given universe. This is rather the question being asked here: is there any experimental way to know which extension reflects reality?
Jan 31	comment	What experiment would disprove string theory? Your indication of the importance of quantum gravity to this question is a great point.
Jan 29	comment	How can I measure the conductivity of a copper rod? Well, you could always measure the length and the resistance with a ruler and ohmmeter, and just calculate $\sigma=1/(\rho * l $)
Jan 29	comment	Why does electron-positron annihilation prefer to emit photons? Thanks for the clarification, that is helpful.
Jan 29	revised	Why does electron-positron annihilation prefer to emit photons? added 310 characters in body
Jan 29	comment	Why does electron-positron annihilation prefer to emit photons? OK, it was not clear from your question that this was what you were asking, as opposed to the more general question.