Looks to me like this is, in part, a type of thermoelectric cooler, with the slightly enhanced emission of photons reducing the temperature. I don't see a violation of the second law. Those excess photons amount to a heat flow equivalency (and if "thermalized" by, say, absorption into some black material, will raise the temperature).
John,
I guess we must define "0.1% Speaker" with reference to SPL. I have a 300B SE Amp that is also an 0.1% Amp. But of course not at rated power...
Then again, I really do not enjoy measuring speaker distortion at 110dB/1m under my current conditions, not even with ear defenders on.
There is a reason I ask. It is the EBU maximum monitoring level, based on 94dB average SPL at -14dBfs average recording level at the listening position.
2N/m^2 is 2 Pascal which is 100dB (1 Pascal is microphone reference level and equals 94dB), if we correct for the distance (doubling distance attenuates SPL by 6dB for an ideal spherical radiator in free space) it is 106dB/1m.
Pretty good numbers for these SPL's...
Ciao T
I guess we must define "0.1% Speaker" with reference to SPL. I have a 300B SE Amp that is also an 0.1% Amp. But of course not at rated power...
Then again, I really do not enjoy measuring speaker distortion at 110dB/1m under my current conditions, not even with ear defenders on.
There is a reason I ask. It is the EBU maximum monitoring level, based on 94dB average SPL at -14dBfs average recording level at the listening position.
2N/m^2 is 2 Pascal which is 100dB (1 Pascal is microphone reference level and equals 94dB), if we correct for the distance (doubling distance attenuates SPL by 6dB for an ideal spherical radiator in free space) it is 106dB/1m.
Pretty good numbers for these SPL's...
Ciao T
A transistor in saturation shows the same heat-pumping effect and I have observed it with an infrared microscope. The above result is not surprising.
Ah, such uninquisitive souls. Just for fun some time back I searched the web for perpetual motion machines that I could build. I settled on a very simple one.
You insert a zinc plated steel rod inside your copper water supply line. Properly insulated it was supposed to be able to light an LED forever. Well the LED did glow on the low voltage (as just mentioned.) Unfortunately forever seemed to be about three months.
So you can build a perpetual motion machine without violating any laws except one. Just limit the time for perpetual!
Oh yeah I loved the magnetic ones. The basic assumption is that where it takes energy to move iron away from a magnet no energy is required to move it sideways! A slight misapplication of inverse square law was involved.
But I reserve the right to play with any such gizmos if I can't see where they go wrong... You never know for sure!
SY do you think zinc, chlorine and copper might form a power source? 🙂 🙂 🙂
You insert a zinc plated steel rod inside your copper water supply line. Properly insulated it was supposed to be able to light an LED forever. Well the LED did glow on the low voltage (as just mentioned.) Unfortunately forever seemed to be about three months.
So you can build a perpetual motion machine without violating any laws except one. Just limit the time for perpetual!
Oh yeah I loved the magnetic ones. The basic assumption is that where it takes energy to move iron away from a magnet no energy is required to move it sideways! A slight misapplication of inverse square law was involved.
But I reserve the right to play with any such gizmos if I can't see where they go wrong... You never know for sure!
SY do you think zinc, chlorine and copper might form a power source? 🙂 🙂 🙂
That may or may not be true - I don't know. The issue is not whether it was predicted but whether it was in principle predictable: is it a consequence of current knowledge (even if nobody realised this for a while) or does it require an extension of current knowledge? I think the former is the case.john curl said:
You use "uninquisitive" in the sense of 'knowledgeable'?simon7000 said:
I think we do.
This is arcane knowledge accessible only to members in good standing of the Rationalist Mafia and the Illuminati. Before explanation, you must subject yourself to the Feats of Strength and to the Airing of Grievances.
Although physicists know the name in conjunction with the Third Law, Nernst laid the basic foundations of electrochemistry and the relationship between redox potentials and concentrations. The Nernst equation describes how electrochemical cells like batteries may be calculated.
Nernst equation - Wikipedia, the free encyclopedia is a very accessible and surprisingly correct explanation.
Early telegraph systems sometimes simply buried the right metals down into the ground, guys with metal detectors sometimes find these "batteries" still working after >100yr!
Scott,
Well, or such is the current dogma of the current religion, anyway.
I just caught my thumb in the door and scraped off some meat. I sincerely hope that at least this matter will stop expanding any time soon...
Ciao T
Well, or such is the current dogma of the current religion, anyway.
I just caught my thumb in the door and scraped off some meat. I sincerely hope that at least this matter will stop expanding any time soon...
Ciao T
Well, one step is to be comfortable with the possibility of never knowing one way or the other.
Scott,
I am very comfortable with the fact the certain things simply transcend anything we can make sense of, at least while that which is us is limited by "the meat" and the MEST* Continuum.
In fact, I'm the mystic here who says that there are things observable but not fully explainable by any theory and hence unknowable lest we change we fundamentally change the way we attempt to understand things. You are supposed to be the one who stands up for science and that all worth knowing is already known, or at least as close to as we need anyway.
But to me uncertainty holds promise, not threat...
Ciao T
*MEST = Matter Energy Space Time
I am very comfortable with the fact the certain things simply transcend anything we can make sense of, at least while that which is us is limited by "the meat" and the MEST* Continuum.
In fact, I'm the mystic here who says that there are things observable but not fully explainable by any theory and hence unknowable lest we change we fundamentally change the way we attempt to understand things. You are supposed to be the one who stands up for science and that all worth knowing is already known, or at least as close to as we need anyway.
But to me uncertainty holds promise, not threat...
Ciao T
*MEST = Matter Energy Space Time
I thought that that is a 'secret'!😉
[Couldn't help but include this, by W.B.Yeates - in response to his becoming involved with your 'icon'..............it sums up this thread - well, somewhat, in places!😀😀😀
But the wind changes and the valley howls
One howls his answer back and one by one
They drop upon all fours, creep valley -- wards
Question that instant for these forms O heart
These chuckling & howling forms begot
the sages.
WBY
When Yeates was reintered in Drumcliffe, Co Sligo, my Father who was an Anglican parson, took part in the ceremony whilst I sat in the car wondering what all of the fuss was about!]
Turning and turning in the widening gyre, spelling failed us here: Yeats Or as Alan Bennett overheard someone pronounce it "William Butler Yeast", to which a friend commented "Ah yes, responsible for the uprising" 😀
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