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bio website N/A
location The South
age 23
visits member for 2 years
seen 20 hours ago

Mar
21
comment What's the meaning of the age of the universe?
You have gravitational time dilation backwards. The closer a clock is to a source of gravitation, the more slowly time passes. So instead we might expect time to flow infinitely slowly for your impossible observer.
Mar
21
comment How do collisions of fundamental particles produce different fundamental particles?
@csabol Hehe, the thing about a surprise is that eventually it stops surprising you if it keeps happening. We do get used things. It's happened before, though we're prone to forget it. For example, look at what you said: "both my vibrating vocal chords and the vibrating air particles are massive objects, and thus I would not be surprised by their interaction". Air is substance? This substance has mass? That mass is comprised of particles? The particles vibrate? That's four surprises right there that you apparently take for granted today. ;)
Mar
21
comment Why don't we have more elements?
@BMS I don't think that's what he's doing. I think he's referring to the fact that the chemical elements are only composed of up quarks, down quarks, and electrons.
Mar
21
comment How do collisions of fundamental particles produce different fundamental particles?
Something else just occurred to me. That analogy basically is attempting to make the creation and annihilation seem less mysterious by pointing out that we're already used to waves exhibiting this behavior all the time. And QM says particles are also waves, right? So crisis averted. Historically though, wave-particle duality came about 30 years before matter creation and destruction. This must be one of the reasons why wave-particle duality gave people anxiety attacks in the beginning.
Mar
21
comment Black hole (classical or quantum?)
Great question! Physicists would be foaming at the mouth for chance to actually perform this experiment.
Mar
21
comment How do collisions of fundamental particles produce different fundamental particles?
@Andrew That's one of my favorite Feynman stories, mainly because his analogy went a long way towards helping me explain to my father at least. The sound of my voice when I speak wasn't somehow inside my voice box the entire time (it's not a literal box full of voice!), and it's not as if we have a stock of, say, 20 'ah's and once we use 'em up we have to go to the store and buy more. The vibrations of our vocal chords simply produce sounds on demand, and once a sound has completely dispersed it's gone for good, as opposed to having gone somewhere else.
Mar
21
comment Special relativity: moving charge and twisting bar magnet
Probably relevant background information: The moving magnet and conductor problem wiki.
Mar
16
comment Physical motivation for differentiation under the integral
@pppqqq While you certainly have a point, it's been my experience that physicists are occosaiinally better equipped to answer some math questions by virtue of a difference of emphases in their educational background, and I don't personally think there's anything wrong with asking those questions on this site. This may be one of those questions.
Mar
15
comment Can we have a static point in the universe?
I repeat, there is no center of the Universe.
Mar
14
awarded  Pundit
Mar
14
comment Does the light speed change in media?
Actually, relativity does say that massless particles can't travel slower than $c$.
Mar
14
comment Can we have a static point in the universe?
Except there is no center of the universe.
Mar
14
comment Does the light speed change in media?
Relativity says that the speed of light in vacuum is invariant. That's all.
Mar
9
comment Quantum distance ladder
Brownian motion was historically the smoking gun that proved Dalton's atomic theory beyond a shadow of a doubt. But any chemist worth his NaCl already knew that matter had to be made of atoms.
Mar
8
comment Magnetic monopole
The videos you watched are mistaken. What condensed matter physicists have discovered aren't really magnetic monopoles, but are instead just quasiparticles that superficially resemble monopoles. The people who made the videos you watched probably just don't understand the difference.
Mar
3
comment How to obtain the distance traversed by a free falling body equation?
Well, Galileo first obtained it by rolling balls down ramps and measuring out the distances and times with rulers and clocks.
Mar
2
comment Position and momentum bases in quantum mechanics
The first is wrong.
Feb
25
comment Is the total energy of earth changing with time?
@naught101 But it's absolutely relevant to the question of equilibrium, which is what I was addressing.
Feb
24
comment Different formulas for calculating power
What do you mean "you may not want to use others if ohm's law does not apply"? If Ohm's law does not apply, then the other equations are not generally valid. You never should use invalid equations! =p
Feb
24
revised Different formulas for calculating power
improved formatting