| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 940.1 | :-() AAARRRGGGHHHH!!! That's cold! | LISP::DERAMO | Daniel V. {AITG,LISP,ZFC}:: D'Eramo | Wed Oct 05 1988 12:14 | 4 |
| When I take a long shower, it's a race as to who will
finish first, me or the hot water.
Dan
|
| 940.2 | | HERON::BUCHANAN | and the world it runnes on wheeles | Wed Oct 05 1988 13:50 | 7 |
| > When I take a long shower, it's a race as to who will
> finish first, me or the hot water.
Neat idea, Dan, but that's not the one I was thinking about.
Assume that we have an arbitrarily large supply of hot water.
Andrew
|
| 940.3 | Source of much bad coffee from the well meaning. | ERLTC::COOPER | Topher Cooper | Wed Oct 05 1988 14:42 | 7 |
| I don't know what you had in mind, but one such case is with the
standard "office" coffee makers. They keep a resevoir of hot
water and depend on the water being cold -- hence denser -- to
displace the hot water. The warmer the water you poor in the
more they mix and the cooler the water which comes out.
Topher
|
| 940.4 | Heat of solution maybe? | HIBOB::SIMMONS | | Wed Oct 05 1988 14:57 | 12 |
| There are some salts which will cool water when dissolved - Calcium
chloride and bromide do this in a big way. Calcium bromide has
been used in absorbtion refigeration where what you talk about is
done. For more data on this phenomenum, look under heat of solution
in a chemistry book where you will see that water may be either
warmed or cooled in this way depending on whether the heat of solution
is positive or negative.
So what were you doing?
Chuck
|
| 940.5 | It's gotta be Alchohol! | MCIS2::FRIEDMAN | A missed plane is a missed plane | Wed Oct 05 1988 19:38 | 11 |
| RE: < Note 940.0 by HERON::BUCHANAN "and the world it runnes on wheeles" >
You want to add energy and decrease temperature?? Sounds like you
were drinking alchoholic beverages with ice!!
Suppose hot water increases the salinity in the drink, more ice
will melt then lower the temperature of the water.
Pretty thin explanation...
James.
|
| 940.6 | Cool brew | AKQJ10::YARBROUGH | I prefer Pi | Thu Oct 06 1988 18:14 | 7 |
| > Can anyone stunningly intuit the domestic activity I was engaged
>in that caused me to observe this strange phenomenon?
Maybe you were making iced coffee? The 'vessel' might be the top of an ice
cube...
Lynn Yarbrough
|
| 940.7 | | HERON::BUCHANAN | and the world it runnes on wheeles | Thu Oct 06 1988 18:44 | 10 |
| Suppose I've got a basin full of cool water, and I want to replace this
with hot water. I can pull the plug out, all the water runs out, then replace
the plug and turn the hot tap on.
But suppose that I turn the hot tap on earlier, when I pull the plug
out. Then I never reach a stage where all the cool water is gone. It just
mixes with the hot water. So when I put the plug back in, the temperature is
always going to be lower than if I'd waited before turning the hot tap on.
Andrew
|
| 940.8 | Don't understand | HIBOB::SIMMONS | | Thu Oct 06 1988 20:37 | 4 |
| I have trouble with the semantics. I don't see any relation between
the words in .0 and the words in .7.
Chuck (puzzled)
|
| 940.9 | | HERON::BUCHANAN | and the world it runnes on wheeles | Thu Oct 06 1988 21:54 | 13 |
| Sorry, let me try another tack.
In the mornings, I'm often in a hurry. I wondered if I could speed up
the time between finishing washing my face (= start situation, sink full of
cool water) and begining shaving (= end position, sink full of nice hot water
for shaving with).
The variables under my control are: plug in or out, hot tap on or off.
All I'm trying to demonstrate is that if I switch on the hot tap before the
sink has drained, ie. have MORE hot water flowing into the sink than otherwise,
then the water ends up COOLER.
Andrew
|
| 940.10 | Oh | HIBOB::SIMMONS | | Fri Oct 07 1988 13:12 | 2 |
|
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| 940.11 | | SHAPES::CLINCHS | Simon @UCG, DTN 7781-4188 | Tue Oct 25 1988 17:17 | 7 |
| re .9
I don't understand how you can make the assumption that there must
be no conduction or radiation - I would have thought that these
were the essence of the problem.
-Simon.
|