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Thread: Is this really possible science wise or is it a trick?

  1. #1 Is this really possible science wise or is it a trick? 
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    Can you really make aluminum float like this or is it some sort of a special effect?

    http://www.youtube.com/watch?v=XjCmwuGKR6g

    Just wondering?
    John


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  3. #2  
    Administrator KALSTER's Avatar
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    Did you read this from your link?
    Two little mad scientists investigate Helium and Sulfer Hexafluoride. Rosie and Anna study Helium, a gas that is lighter than air, and Sulphur Hexafluorid (SF6), an inert gas that is much heavier than air. Just like the internet famous University of Bonn Physics Department Demonstration (Physikshow Uni Bonn) and Science Day displays they are able to magically float a small ship made of aluminum foil above the ground on a blanket of gas and then sink it by pouring the gas into the boat with a beaker. This is also known as the invisible water effect. Helium has the well known effect of raising the pitch of the voice. S6F has the opposite effect and lets you say things like "You're crazy man" (like Will Farrell in the movie Old School) or copy Darth Vader, "Luke, I am your father" (like James Earl Jones as Darth Vader in Star Wars).
    Cool, but not hoaxery.


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  4. #3  
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    It's real - I have done it myself with SF6 for a science demonstration. The only reason it isn't a very common demonstration is that SF6 is veeeeery expensive.
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  5. #4  
    Forum Bachelors Degree Shaderwolf's Avatar
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    This is also known as the invisible water effect.
    think on it. The aluminum floating, can be described by the same equation as a boat on watter.

    It can float if the weight of the gas displaced by the object is greater than the weight of the object. That's why the aluminum was hollow, it incresed the displacement.

    If you realy think... that's why helium floats to.
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  6. #5  
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    That's really cool!
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  7. #6  
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    I know of a guy that inhaled argon (also heavier than air) to make his voice sound deeper (trying to gain the opposite effect of He). He nearly asphyxiated because he couldnt breath out the stuff because of it's density! He had to be tipped upside down to do it!

    Stoooopid!

    DONT DO IT! ITS STOOPID! (and doesn't work)
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