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Thread: Coldest Ice

  1. #1 Coldest Ice 
    RJK
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    Hello everyone,

    I got a question from my colleague today... how do you get the coldest ice (water) out of a freezer? It is allowed to apply a substance to the water.


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  3. #2  
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    Do you mean de-frosting the freezer?

    We just place a fan in front and blow warmer air in, takes about 1 hour at the most.


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  4. #3  
    RJK
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    no, sorry... I meant ice cubes.
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  5. #4  
    RJK
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    If you would have a contest to make the coldest ice cube and you would all have to use the same freezer... how would you win?
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  6. #5  
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    I'd re-wire the thermostat, put the freezer in the coldest place I could, blow cool air over the exchanger, and produce Ice at about -50 degs
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  7. #6  
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    u could try puoring liquid nitrogen on the water i guess.... fast n cold ice...
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  8. #7  
    Forum Freshman Wilhelm's Avatar
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    mmmm... try sticking a tooth pick in the water and freezing it.
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  9. #8  
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    We use a plastic tray which has 3 rows of 8 'cube holders' when they are frozen I take out the tray, grasp each end and twist it back and forth, this causes all the cubes to 'unstick' ready for removal.
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  10. #9  
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    Are you allowed to add substances, e.g., the common salt, to meddle with the freezing point?
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  11. #10  
    Forum Freshman Kosta's Avatar
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    I'm confused as to what exactly we are talking about. We are trying to figure out a way to get the "coldest ice" out of a freezer? What is "coldest ice"? Am I missing something here?
    In order to make an apple pie from scratch, you must first create the Universe. - Carl Sagan
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  12. #11  
    Forum Sophomore Kabooom's Avatar
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    My understanding is that everyone is using a freezer and water, and whoever can make the lowest temperature ice wins. As in -30 would beat -10 ice.

    What are the rules, as in can the freezer be re-wired as mentioned above, could the freezer be put in a really cold area? Adding insulation to the freezer?
    WHAT?!
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  13. #12  
    Forum Freshman taxpo's Avatar
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    Quote Originally Posted by Megabrain
    I'd re-wire the thermostat, put the freezer in the coldest place I could, blow cool air over the exchanger, and produce Ice at about -50 degs
    I agree
    l=l0[1+α(t-t0)]
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  14. #13 Try this experiment !! 
    Forum Professor leohopkins's Avatar
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    Get some saw-dust and mix it with water; now freeze it. Take it out and see how long it takes to melt. It takes months possibly even longer!!

    Why? I dont know !!
    The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.

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  15. #14  
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    Why so saw dust adding to water makes ice not easy to melt fast?
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  16. #15 Correct !! 
    Forum Professor leohopkins's Avatar
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    That is correct !!

    And in fact it melts THAT slowly that they were seriously considering building war-ships out of this substance during WW2 so that they would be invisible to radar.

    the idea never quite took off though.
    The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.

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  17. #16 Re: Correct !! 
    Forum Senior silkworm's Avatar
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    Quote Originally Posted by leohopkins
    That is correct !!

    And in fact it melts THAT slowly that they were seriously considering building war-ships out of this substance during WW2 so that they would be invisible to radar.

    the idea never quite took off though.
    That's interesting. I've never heard that.
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