XPost: alt.home.repair, uk.d-i-y, alt.sci.physics   
   From: William_Gothberg@internet.co.is   
      
   On Mon, 31 Dec 2018 07:18:47 -0000, Diesel  wrote:   
      
   > "William Gothberg"    
   > news:op.zuspthk07uplkq@desktop-ga2mpl8.lan Sat, 29 Dec 2018 18:04:19   
   > GMT in alt.home.repair, wrote:   
   >   
   >> On Sat, 29 Dec 2018 17:46:36 -0000, Clare Snyder   
   >>  wrote:   
   >>   
   >>> On Sat, 29 Dec 2018 17:15:05 +0000, Bill Wright   
   >>>  wrote:   
   >>>   
   >>>> On 29/12/2018 16:27, William Gothberg wrote:   
   >>>>   
   >>>>> It can take 5 minutes to warm something from frozen to eating   
   >>>>> temperature.  I see no reason that couldn't be made into 2   
   >>>>> minutes.   
   >>>>   
   >>>> Conduction   
   >>>>   
   >>>> Bill   
   >>>   Cooking a steak in 2 minutes would likely be like cooking an   
   >>>   egg in   
   >>> it's shell in a microwave.  Zapp!! - Splatt!!!!!!   
   >>>   
   >>> even boiling a tall cup of water at 1000 watts can be dangerous   
   >>>   
   >>>   
   >>> Boiling of water occurs when bubbles of water vapor expand in   
   >>> liquid water and are released at its surface. When water is   
   >>> heated in a microwave, it may remain undisturbed during the   
   >>> heating process so that there are no nucleation sites around   
   >>> which bubbles may form. The superheated water may appear to be   
   >>> cooler than it really is since the water did not visibly boil.   
   >>> Bumping a cup of superheated water, adding another ingredient   
   >>> (e.g., salt or sugar), or stirring the water may cause it to   
   >>> boil, suddenly and violently. The water may boil over the cup or   
   >>> spray out as steam.   
   >>>   
   >>> To prevent this from happening, avoid reboiling water. Boiling   
   >>> drives dissolved gases out of water, so when you allow it to cool   
   >>> before boiling it again, there are fewer nucleation sites to   
   >>> allow boiling at the boiling point. Also, if you suspect water is   
   >>> hot enough that it should have boiled, move the container with a   
   >>> long-handled spoon so if explosively boiling occurs, you're less   
   >>> likely to get burned. Finally, avoid heating water longer than   
   >>> necessary.   
   >>   
   >> That's a myth.  I've seen those silly posters in the workplace -   
   >> never boil water on its own, don't take it out as soon as it stop   
   >> heating etc, etc.   
   >   
   > NO! It's not a myth. The following is from first hand experience...   
   >   
   > I had a 1kw microwave I used for burritos. It died (the transformer   
   > puked); I replaced it with a 1100 watt model; didn't think 100watts   
   > would make much of a difference.. I put my burrito in, set the time,   
   > walked away.. it destroyed my burrito. burnt popcorn smell in my   
   > brand new microwave. Dunno why it smelled like burnt popcorn  but, it   
   > did...   
      
   Well I guess you should have reduced the time by a factor of 1.1....   
      
   > Not wanting to be a dishonest shit, I didn't take it back to the   
   > store. I opted to clean it with vinegar and water.   
      
   I've heard of someone throwing out a microwave because the bulb's gone, but   
   not because it's dirty....   
      
   > So, I took a mixing cup, added some vinegar (too much it turned out)   
   > and water. Microwaved it. Observed it begin to bubble up, then it   
   > stopped bubbling. The water was clear as can be, no surface activity.   
   > I thought the new microwave quit working! So, I got real close and   
   > continued watching the mixing cup; not appearing to do a damn thing.   
   > No more bubbles, no nothing. No activity I could see.   
   >   
   > Until ... ka fucking boom! The door safety latches caught it,   
   > otherwise it would have drilled my happy ass right in the face as it   
   > opened violently, spilling super hot fucking water all over my shoes   
   > (lucky for me, steel toe boots I hadn't removed yet) and alot of   
   > steam that I didn't observe building in the chamber prior to the door   
   > violently opening. I've never had this happen before, so I inquired   
   > about it via a usenet post. Mark Lloyd I think it was explained what   
   > I got to observe first hand; and in hindsight, it was a very stupid   
   > fucking thing for me to have done. Super heating is real, it's not a   
   > myth and it's fucking dangerous to do. I lucked out, the microwave   
   > wasn't so cheaply made that it let the door hit me in the face with   
   > some force. And the mixing cup didn't explode; I originally thought   
   > the cup broke or something and that's what happened; until I removed   
   > the cup and found it was fine.   
      
   There must be some very unusual circumstances to make that happen, because I   
   have actually tried to make it happen on purpose a few times, and it never   
   works.   The water simply boils and bubbles over, just like it would on a   
   stove.  I think you need an    
   absolutely spotless glass, water with no existing bubbles, perhaps from   
   filling it from the tap, and no movement (I would have thought the vibrations   
   of the turntable would stop it, do you have one of those new turntableless   
   ones?)  Maybe the vinegar    
   made it happen?  People use it to stop streaking when washing windows.  That's   
   not a usual thing to heat.   
      
   >> Put a glass of water in a 900W microwave, and watch it do nothing   
   >> for a few minutes, no bubbles, just slowly slowly warming through.   
   >> Why not have that twice as fast?   
   >   
   > Except it's not just slowly slowly warming through. It's super   
   > heating and is unstable.   
      
   Only once it gets to that point.  It takes a long time from tapwater   
   temperature to boiling point.  That's the time consuming part of cooking   
   something.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)