DC Wave Questions

Well, it takes one calorie per gram to raise liquid water one degree centigrade - I wonder if, at an ambient pressure of, say, 10^3 Pa, it still takes 540 calories per gram to transform a gram of liquid water at

0degC to a gram of gaseous steam at 0degC.

According to the graph at

, approx. 10^3 Pa, whatever the hell that means. Obviously, an atmosphere is up there near the "annoying point", ;-) , between 10^8 and 10^9 Pa.

Hope This Helps! :-) Rich

Lame.

Approx. 10^3 Pa.

^j

From "Channeling Class": "...You will know how to interpret the information in my energy because it will show up as a pattern in your imagination.

"Channeling, like all other inner phenomena happens in the imagination. This is the faculty humans use to access the inner planes, spiritual worlds, divine reality or whatever you wish to call what is beyond the external, material world. We'll make use of the imagination to establish contact with each other, and to carry out the channeling process. You can think of the imagination as a permeable membrane located right at the water line in the metaphor of the iceberg in the introduction to this class. Being between the two major parts of the mind, it is shared by both.

"New ideas, insights, creative inspiration and intuition all begin in the unconscious mind. As these kinds of impressions, including the energy you will be interpreting, rise to awareness, they pass through the imagination. The conscious, aware mind perceives these impressions as representations in the imagination. Sometimes the impressions are represented visually as images or pictures, sometimes auditorily as sounds or words, and sometimes sensorially as feelings or energy." --

So, don't knock the imagination. ;-D

Do you happen to know what the triple-point of water is?

Best regards, Spehro Pefhany

Was the topic "Olympic-Grade Trollfeeding?"

John Fields, you won that one by a landslide some time ago.

In any case, what you have to do in analysis is to treat each frequency separately, including the 0 frequency term. What's the big deal.??

Anybody who doesn't like it, feel free to bang out the de's.

j

Not true, unless 0.01+ oC counts as "0C" or "boil" has some novel meaning other than a liquid to vapor phase transition occuring within the liquid due to applied heat.

[Stuff on latent heat zapped.]

I said "near 0.01 oC", not "at". At temperatures above the triple point (at 0.01 oC), a liquid/vapor phase change exists. Below that, there is no such phase change, so there is no possibility of boiling, which requires a liquid. Precisely at the triple point, I'm not sure it is meaningful to speak of boiling because the triple point exists under equilibrium conditions and boiling is not an equilibrium. (Boiling is a catastrophic process.)

The table of triple points shows, in its first row, that triple point often referred to as "the triple point". (That is the one now used to define 0.01 oC on the Centrigrade temperature scale.) This triple point, between the liquid, Ih (hexagonal ice-one) and vapor phases, represents the lowest pressure at which an Ih/liquid phase transition exists, as can be seen from the graph. It is clear from the graph that the vapor phase boundary slope is continuous as it passes thru that triple point, and has positive slope. So, clearly, where it passes thru 0 oC has to be below that triple point.

Nope.

This Topic is EVIL ! ~ EVIL' I Tell You ! The Original Post is the Operating DC Voltage of a Vibrating Sex Toy };-)

Somebody Please Start a New Thread !

Like why would anyone cut the Plug off of an AC, then, Tape in an Extension and then Tape the Plug back in at the End., I feel like I have to Shoot Someone...Why ?

};-) Roy (Ghetto Technical Inspector)

Not in my donut - there was no hole till the donut was made - I was there and I saw it enter the mixture.

Ken

He appears to be confusing sublimation and evaporation with boiling.

Like I said before, Don, the big deal is people with nothing better to do than start internet arguments, all the while ignoring all the bits of knowledge that spill out during the course of same. Case in point.

That was never five minutes!?

No, but there's an awesome graph - did I mention something that I called "the Annoying Point" - in either another branch here or another thread that had also degenerated to a virtually amusing point. ;-) Oh, as a matter of fact, I'm almost sure that it's in another response to this very John F. x Floyd L.D. pissfest.

Anyways, if you go to the URL above, and just scroll down to below the first paragraph, which is a page in a teeny tiny monitor; there's a couple of awesome graphics. There are a whole bunch of points that could be construed as "The Triple Point", like, at 10^3 Pa - One kilopascal? at 273ish K, where water can freeze and boil simultaneously.

And if you look up in the "increasing pressure" direction, you'll see a kind of "crowded" or "busy" area. There's an enlargement of that area - where the "Triple- Point" _could_ be construed to be that little blue area labeled "III". But that _couldn't_ be the triple point, because there's no steam!

So, yeah, I have no idea what the triple-point of water is, other than that I'd heard where "the three states" all come together.

So, OK - I'm guessing about 273ish K at about one kilopascal. ;-)

(and the "lame" crack came about by your accolade of "Good one, J..." for merely expressing an invitation to do a web search that took me all of about four seconds. Sorry, I just didn't think that it was that great big a deal for a guy to say, "put your money where your mouth is." I since have, and nobody seems to have noticed that I've stumbled on a site that tells not only about the ten states of ice, but also, get this:

------ Enthalpy of Vaporization [61] 45.054 kJ mol-1 (0°C), 40.657 kJ mol-1 (100°C)

Enthalpy of Fusion 6.0095 kJ mol-1 (0°C, 101.325 kPa) [60] 6.354 kJ mol-1 (81.6°C, 2150 MPa, ice VI) [535]

Enthalpy of Sublimation 51.06 kJ mol-1 (0°C)

------ from amongst parameters that I didn't even know there were, at

.)

Wait a minute! There's a picture of the triple-point!

Kewl! "(273.16 K "exactly ...) The triple point is the temperature and pressure at which three phases (here liquid water, hexagonal ice, and water vapor) coexist at equilibrium, and will transform phase with suitable but tiny changes in temperature or pressure."

So, now, I guess I do! :-D

Thanks! Rich

Confining comments to the topic makes newsgoups work better.

I believe that the "boiling point" is when the partial pressure of the liquid at the applied pressure and temperature is equal to the applied pressure. "Boiling" may be entirely apporpriate.

Bud--

Reading back through the thread I can see how John attributed the "tutorials" to "the Phantom", but the "tutorials" quote (in "the Phantom" post) was lifted from a post by Don Lancaster. I used square brackets as they are commonly used.

Bud--

OK, my final position:

Whoever said that DC cannot exist, shouldn't authoring tutorials.

and

Whoever posts stuff typed by others, without the > thingie first, is likely to confuse folks.

John

I see what happened.

In retrospect it is clear the "tutorial quote" came from one of Don Lancaster's posts. However, when the Phantom used it in his post, much of Don Lancaster's post was not attributed to him (Don): As with the Phantom's post, there were no attribution carrot(s) so it appeared to be part of the Phantom's post.

Subsequent posts were targeting what incorrectly appeared to be Phantom's tutorials.

All that aside, always in for a penny in for a pound, I now conclude that my remark was aimed at Don Lancaster's comment on DC.

Take your best shots.

Don (B)