Cheap thermometer calibration technique?

[Eeyore]

If boiling point goes up with reduced atmospheric pressure, then why
does water boil as one approaches a vacuum at room temp?

I expect that's simply liberation of dissolved air.

Graham

 

[Eeyore]

Cooking time, not boiling point, goes up. How long would eggs take to
cook at room temperature?

Depends if you like them soft or hard.

Graham

 

[Eeyore]

Who said the boiling point goes up?? It takes longer to boil an egg in
Denver because the boiling point is _*LOWER*_ with lower atmospheric
pressure.

Correct. It's also not good for tea too.

The "Boiling point" is the temperature at which the vapor pressure reaches
atmospheric pressure."

Ever heard of "the Curate's egg" ?
http://en.wikipedia.org/wiki/Curate's_egg

Graham

 

[Eeyore]

A
little


bit of knowledge can be dangerous...

Isn't it always ? The things I've seen people do !

Graham

 

[Eeyore]

Which is why I reccomended condensing steam on a metal block. Avoids
all sorts of problems with superheat. Once you've done that, might as
well use the same block in melting ice for consistancy.

Sure, but my method works in the office kitchen with an electric kettle. Note that the
temp drops a couple of degrees when power is removed, indicating that the liberated
steam is (briefly) over 100C.

Graham

 

[Eeyore]

I JUST USED TO HOLD THE SENSOR IN MY HAND AND SET FOR 37.5°C.

But there are hot and cold people by at least a degree either way.

Graham

 

[Eeyore]

I JUST USED TO HOLD THE SENSOR IN MY HAND AND SET FOR 37.5°C.

p.s. I thought it was 37.4 anyway.

Graham

 

[Eeyore]

You'd do much better by sticking it umm.. somewhere more ummm..
consistent in temperature...

The way the French do ? Wonder what they do in Quebec !

Graham

 

[Eeyore]

NO, it does not "save" anything. Particularly energy.

If you published ten GB of data as all caps ASCII text, THEN you MIGHT
save a few milliwatts.

Since we merely write a few lines, the amount of energy used is quite
large, comparatively, and quite wasteful in all cases where one has only
written a few lines.

The less data that a computer actually processes per unit time, the
more wasteful they are, and below a certain point, the computer is at an
"idle state" from a consumption POV for all tasks performed that are not
heavy CPU intensive tasks..

In other words, the GUI and overhead for your machine means that unless
you are actually crunching numbers furiously in a process that actually
taxes the machine, the little petty bits of "work" you perform all use
the same amount of energy per unit of machine time.

Could this possibly be the funniest and most arcane thread to appear in s.e.d
for a long long time ?

Graham

 

[Don Bruder]

I expect that's simply liberation of dissolved air.

Graham

Nah. Or at least, not just that. Pull (and hold) sufficient vacuum on a
container with water in it, and the water will indeed boil away at low
temperature. Granted, you'll get any dissolved air out of it during the
process, but that'll only be part of what goes on.

 

[Jasen Betts]

I AM GLAD YOU ASKED THAT. SIMPLE:
CAPS HAVE ONE BIT LESS SET, SO IT SAVES ON ENERGY.

Not here. I have a CRT display and read news in white-on-black.
Caps have more pixels set, therefore more illuminated CRT pixels
so more energy used.

Bye.

 

[Eeyore]

Not here. I have a CRT display and read news in white-on-black.

Ouch ! That must hurt !

Graham

 

[Archimedes' Lever]

Who said the boiling point goes up?? It takes longer to boil an egg in
Denver because the boiling point is _*LOWER*_ with lower atmospheric
pressure.

The "Boiling point" is the temperature at which the vapor pressure reaches
atmospheric pressure."

Hope This Helps!
Rich

Yes... less caloric input to the egg per unit time.

 

[Archimedes' Lever]

Nah. Or at least, not just that. Pull (and hold) sufficient vacuum on a
container with water in it, and the water will indeed boil away at low
temperature. Granted, you'll get any dissolved air out of it during the
process, but that'll only be part of what goes on.

He is an idiot. The excess air comes out of water LONG before it ever
reaches a vacuum.

It changes phase, DonkTard. Lay terms... that's boiling, idiot, which
it physically does quite violently, until it is all vaporized, and
removed from the chamber (most of it).

 

[Archimedes' Lever]

Not here. I have a CRT display and read news in white-on-black.
Caps have more pixels set, therefore more illuminated CRT pixels
so more energy used.

Bye.

Is it all black or all white that uses more power on a CRT?

LCD? Plasma?

Subtractive or additive color mixing?

 

[Jasen Betts]

Is it all black or all white that uses more power on a CRT?

On a CRT the illuminated pixels come from (multiple) electrons sent
from the back end of the tube at high speed, dark pixels are where
no electrons are flowing.

LCD?

LCDs use a kind of optical gate to control the flow of light, dark
pixels and light pixels cost pretty-much the same amount, most of the
energy is used to run the backlight.

Plasma?

these are like a bunch of tiny neon lamps, they light up when a
current is flowing, dark pixels use less power.

LED displays are like that too.

Subtractive or additive color mixing?

Until the dark emitting diode is prefected all luminescent displays
will be additive

 

[Sandbox Moderator]

It doesn't. Everybody's known that since fourth grade, except the
incurable idiots.

Thanks,
Rich

 

[Rich Grise]

Nah. Or at least, not just that. Pull (and hold) sufficient vacuum on a
container with water in it, and the water will indeed boil away at low
temperature. Granted, you'll get any dissolved air out of it during the
process, but that'll only be part of what goes on.

I once saw a demo on Mr. Wizard where they had water freezing and boiling
simultaneously.

Cheers!
Rich

 

[krw]

It doesn't matter if they're set or reset. If you're perfectly
consistent, you might save kTlog(2) per character-instance, but only
when the messages are erased. So you might as well use all lower-case,
if you're really shiftless.

it "matters" more than that. lower case letters, numbers, most
punctuation and <sp> all have bit-5 (little-endian) set. the <SP>
is "important" because it exists between words. since it takes
"more" power to change states, a "significant" power savings can be
had by using all lower case.

 

[The Pig Bladder from Uranus]

[email protected] says...>

it "matters" more than that. lower case letters, numbers, most
punctuation and <sp> all have bit-5 (little-endian) set. the <SP> is
"important" because it exists between words. since it takes "more" power
to change states, a "significant" power savings can be had by using all
lower case.

But seriously, how many angels _can_ dance on the head of a pin? >:->

Thanks!
Rich