Text 7230, 122 rader
Skriven 2011-02-15 09:50:00 av Glen Jamieson
     Kommentar till en text av Jim Weller
Ärende: FROST  10215
====================
 -=> Quoting Jim Weller to Glen Jamieson <=-

 JW> Frost is the solid deposition of water vapor, directly from gaseous
 JW> to solid phase, from saturated air on a solid surface that is
 JW> chilled below the dew point of the surrounding air AND colder than 0
 JW> C. Objects on which frost tends to form first generally have low
 JW> specific heat and/or high thermal emissivity.

 JW> Rime "frost" is an icy solid and occurs in very humid conditions
 JW> when water vapour goes through a liquid phase where the surface is
 JW> wet by condensation before freezing.

I have seen that on grass - frozen dew.

 JW> Hoar frost is feathery or fern-like and forms on exposed objects on
 JW> cold clear nights when heat losses into the open skies cause objects
 JW> to become colder than the surrounding air.
 JW> This can happen inside buildings if daytime moisture infiltrates
 JW> when the building is colder than the outside air from the prior
 JW> night's chill.
 JW> Window frost is hoar frost that happens when a glass pane is exposed
 JW> to very cold air on the outside and moderately moist air on the
 JW> inside. If the indoor air is very humid rather than moderately so,
 JW> water will first condense in small droplets and then freeze into
 JW> clear ice (rime).

I have seen that on aircraft windows, where moist air from inside the
plane forms pretty patterns on the inside of the outer windows.
 
 GJ> Never having experienced such a deadly cold climate, I wouldn't know
 GJ> how valid such a depiction of cold would be.  The moisture of the hoar
 GJ> frost would have to have come from somewhere.
 BS> Artistic license for the film, I think.

 JW> I have never seen hoar in a building as dramatic as that in real
 JW> life. But it certainly does happen.

I'll take your word for it.  Thanks for all that frosty info.
 
 BS> somewhere around 0F to so, the water in the
 BS> air starts to freeze and fall in a dust like consistency.
 JW> That's why I have commented in the past that it only snows heavily
 JW> here in Nov and March. In Dec., Jan. and Feb. we just get a little
 JW> "dust".
 JW> It can also remain suspended, if very fine, and create an ice fog.
 JW> This is very common in Yellowknife which can get quite cold and

That would be terrible!  How can anyone breathe without damaging their
nasal passages?  What an awful way to die!

 GJ> A jet aircraft gets its supply of cabin pressurisation air from
 GJ> outside the plane, where the temperature is around -50C, so its
 GJ> moisture content would effectively be zero.  A large proportion of the
 GJ> internal air is recirculated, which brings up the humidity level of
 GJ> the air from passengers' sweat, breath, burps and farts.  It is still
 GJ> quite low, is indicated by the lack of condensation on the outside of
 GJ> your iced drink.
 JW> And the sore throat you get the next day.

Not something that I suffer from.
 
 JW> All the Canadian in-flight safety announcements must be bilingual by
 JW> law. Air Canada does them live but Westjet which has its
 JW> headquarters in Alberta and does not fly east of Toronto has very
 JW> few bilingual employees so they rely on tapes and the flight
 JW> attendant just mimes the movements. (Canadian North and First Air
 JW> also do the drill in Inuktitut on most flights.)

I have experienced that form of taped dual language safety
announcements on domestic flights in Indonesia.  In Europe, the FAs
are multi-lingual and give instructions in English as well as the
language of the airline's home country.  Royal Brunei also plays a
tape of prayers for a safe flight just before take-off.

MMMMM----- Recipe via Meal-Master (tm) v8.05
 
      Title: [Brunei] Rendang
 Categories: Malaysian, Beef
      Yield: 4 servings
 
      1 ts Shrimp paste
      1 kg Rump steak
      1    Stalk lemon grass
      1 ts Salt
      1 tb Sugar
      1 tb Soya sauce
      3    Stalk lemon grass - sliced
           Thinly
    120 g  Grated coconut - fried and
           Pounded
      4 sl Galangal
      5    Candlenuts, Ground
      2 tb Curry power - blended with
      2 tb Water
     30    Dried chillies
    120 g  Shallots
      4    Red chillies
      1    Clove garlic
      2    Cm piece ginger
    1/2 c  Thick coconut milk -
           Extracted from
    1/2    Grated coconut
      8 tb Oil
 
  Heat oil and fry ground ingredients and curry powder until fragrant
  Add in half of the coconut milk and fry until the oil separates. Add
  in the soya sauce mixture and steak. Add in also the fried grated
  coconut and lemon grass. Stir fry for 10 minutes. Pour in the rest of
  the coconut milk and simmer until the meat is tender, for about 1
  hour. Increase heat to reduce gravy until it is thick and oily.
  
  from http://asiarecipe.com/brumain.html
  
  From: Kevin Jcjd Symons
 
MMMMM
 

___ Blue Wave/DOS v2.30 [NR]

--- FLAME v2.0/b
 * Origin: Braintap BBS Adelaide Australia (3:800/449)