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Re: HOLES AS CARRIERS Negative mass?



On Wed, 10 Oct 2001, Robert Cohen wrote:

Is it appropriate to say that the bubble has negative mass? The
gravitational force on the bubble is still down, no? I'm missing something
here.

True unless we neglect the mass of the air ..or perform the experiment in
a vacuum! Use an evacuated bottle which is 90% full of some fluid having
low vapor pressure. The bubble of vacuum will still act the same as a
bubble of air even though it contains no matter.


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