How much water is required to make a tide?

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Des

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How much water is required to make a tide?
« on: 30/04/2011 17:30:02 »
Des  asked the Naked Scientists:
   
Hi,

How large does a body of water have to be to have a tide? Or, which is the smallest body of water that has a tide?

Cheers
Des Enright

What do you think?
« Last Edit: 30/04/2011 17:30:02 by _system »

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Offline JimBob

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How much water is required to make a tide?
« Reply #1 on: 30/04/2011 23:48:45 »
One drop.

It can be measured with great difficulty because of all of the considerations of fluid dynamics, thermodynamics, etc. involved. The measurment is classically done by observing the meniscus. Cohesion between two surfaces, one liquid one solid (mercury and glass are ideal) a vacuum is needed .... it goes on and on and on.

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