swansont

But if the frequency is lower it is moving more slowly. The amplitude depends on the current, not the frequency.

This is, AFAIK, incorrect. What was proposed to disappear was the information about the states of the matter and energy that had entered the black hole, i.e. the Hawking radiation was from a thermodynamic (mixed state) source even if the particles that gave rise to that energy were in a single QM state.

To amplify this, as it were, the speaker is going to respond to the drive signal, which will be a very complex waveform with many frequencies from 10's of Hz to ~20kHz, and a single speaker composition, size and shape will be limited to how well it can respond (flat surfaces would be Bessel functions). So you use filters to send the low frequencies to the woofer and the high frequencies to the tweeter, which are designed for a narrower frequency range.

The problem here is that the bulk resistivity doesn't have the same meaning for a nanowire or thin film. There are far more interactions with the surface of the material, where the electrons might behave differently. A lot of properties of thin film or nanowire materials are different where finite size and quantum interactions are important. But I can't help with the OP. Not familiar with the calculations.

Right, so the volume is going to depend on the amount of current, since a stronger repulsion/attraction will result in a larger displacement of the diaphragm.

AFAIK Murphy's work has not yet been replicated.

Given the 45 degrees, can you relate the initial x and y speeds to each other? Also, FYI, the "same final speed as initial" is also code for "no air resistance"

Ah, it's a trap! "Real" scientists are anal meticulous about such things.

There are many measurements that show that the fine structure constant is currently not changing and has not changed over a significant amount of time. There are a few unconfirmed ones where it might have had a slightly different value in the distant past, of which I am aware. To what experiment(s) are you referring?

The homonym substitution (should be accept vs except) aside, this is something that needs to be stressed more, especially to posters that show up with philosophical objections to scientific theories, or purely metaphysical underpinnings to their own ponderings. Not a nit in my view.

The absorption and re-emission by virtual states still has to obey conservation of energy and momentum when all is said and done. The light changes direction at an interface whaere the index changes, but not in the bulk material.

Google/wiki on thermochromic pigment for more, and send my share of the extra credit to me.

It depends on the type of laser, but in many one polarization will dominate and often internal components will be added to further suppress the other orientation (e.g. a Brewster plate). Some lasers are not considered as being polarized, but are not truly unpolarized, i.e. the polarization is not truly random, and any polarization present will fluctuate. http://www.rp-photonics.com/polarization_of_laser_emission.html

If we use the secondary products of animals that feed on things that we can't eat (like grass) I don't see that as much of an issue. But when feed is also something we can eat (e.g. grain), that's inefficient. I wouldn't be surprised to find that developed countries eat more beef/fowl/fish than they really need to.

Light reflecting off of a surface is usually polarized, so one might expect that the orthogonal polarization is more likely to be absorbed and cut more efficiently. From a conceptual point you might want to read up on Brewster's angle.

Mood books now, instead of mood rings? Think phase change when they are heated past a certain temperature, and so their reflective/absorptive properties change. What kind of material might do that?

No, it has been experimentally confirmed that the accelerating clocks do actually run at the different rate. The twins would not be the same age.

Well, I'm a physicist, so I have to recuse myself; others would have to say whether I have been arrogant. I'm sure some would say yes, and I certainly have been known to be sarcastic. But generally it's when someone comes on the boards claiming that physics is bunk and that they know the real truth. I feel no need to be gentle in debunking the heck out of them. So I do discriminate on the basis of scientific attitude. As for teachers, it may be their way to motivate students to intimate that they are deficient in order to get them to work harder. I personally don't agree with that methodology, but there may be a cultural influence at play. Or they might just be jerks, and physics doesn't have any kind of monopoly on that.

I think it depends on the question. A more specific question lends itself to getting a more personalized answer. There are many instances where the appropriate response to question asked is a Google or Wiki link. It makes the poster appear lazy to ask for a personalized answer to something that's already written up in an easily-found location on the web.

I don't remember having a contract as a graduate student research assistant. It was indentured servitude with a small salary. Anyway, PhD in Atomic physics, working in atomic clock research. (When I'm not pushing papers or electrons around, or other stuff that comes with a government job in an understaffed program)

Do you think it is valid to extrapolate the behavior of all physicists based on two data points?

"All science is either physics or stamp collecting." Ernest Rutherford Your statement, that physics has an insolvable problem, implies chemistry has none. Ergo, chemistry is easier than physics. (Look up Feynman's corollary that all mathematicians can only prove trivial theorems. Scroll down to "A Different Box of Tools")

emphasis added We enter an ice age after September and before March?

Yes, they are.

I'll see your G. Gordon Liddy and raise you a Deep Throat. More than one person kept that secret for many years. And probably the location of Jimmy Hoffa is/was known by more than one person, and there are very likely many more examples.