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Fun with cryogenics and whip cream

  1. Jul 9, 2007 #1
    has any one heard about dipping a can of shaving cream in liquid nitrogen, stripping away the metal and then placing the remains in a car. The effect is supposed to be that the shaving cream expands to such a great volume that it fills the entire car.

    If this is possible I was wondering if the same can be done with whip cream.:rofl:
     
  2. jcsd
  3. Jul 9, 2007 #2
    No, shaving cream is expanding by the boiling of a liquid gas propellant that is under pressure in the can. Whipped cream is full of air at atmospheric pressure. No additional expansion will be available.

    Sorry, I was thinking of the old fashioned way of making whipped cream by hand. If you are using a pressurized can of whipped cream the same results may happen.
     
    Last edited: Jul 9, 2007
  4. Aug 25, 2007 #3
    This definitely calls for an experiment, though in order to preserve a reasonable degree of goodwill within society in general I may reccomend not using a car for the testing.

    Atleast not a very expensive one.
     
  5. Aug 25, 2007 #4

    mgb_phys

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    Real 'Whipped cream' doesn't expand further - it's already whipped.
    I think the OP meant the synthetic 'squirty cream' that come in an presurised can, I think that is cream (probably plus some emulsifier or vegatable oil) and a propellant. So it might work.
     
  6. Aug 25, 2007 #5

    LURCH

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    Wouldn't one get the same amount of expansion by simply taping down the trigger and letting the cream (whipped or shaving) out of the can?
     
  7. Aug 25, 2007 #6

    mgb_phys

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    Yes, but that is being a bit sensible ! It's more fun to watch the uncontrollable expansion of a frozen block of the stuff - at least if it isn't you car.
     
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