why does a helium filled balloon sink after a day without losing any appreciable mass?

after a days shrinkage i think you will find that blowing up a different ballon to the same size as the day old balloon it would have more buoyancy

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  • 1 decade ago
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    Becasue the balloon has lost helium, therefore has less lift. The helium passes easily through the molecules of the ballon, so after a certain length of time, the balloon will totally shrivel up.

    The mass of the lost helium is hard to measure since helium is so light and such a tiny moleclue in comparison to the balloon molecules.

  • 1 decade ago

    balloon's mass is same but escape of helium atoms from surface causes decrease in volume

  • 1 decade ago

    temp might have somthing to do with it.try putting helium from first balloon into second see if its the same

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