Why does a glass of milkshake "hop" if you blow through a straw?

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Ray Burger

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Ray Burger  asked the Naked Scientists:
Good day Chris,

Something which has had my mind puzzled ever since I started drinking milkshake is..... why does the glass hop on the table if you give a short pulse blow through the straw. The straw should be vertical and quite deep into the shake. I've only tried this with long glasses.


Ray Burger

What do you think?
« Last Edit: 28/02/2011 19:30:02 by _system »