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Author Topic: Capillarity question  (Read 5202 times)

Gabriele

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Capillarity question
« on: May 03, 2015, 07:08:41 PM »
Hello again. A device like that shouldn't move if placed in water? Thanks

MarkE

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Re: Capillarity question
« Reply #1 on: May 03, 2015, 07:20:38 PM »
Couples develop torque moments.

Gabriele

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Re: Capillarity question
« Reply #2 on: May 03, 2015, 07:36:03 PM »
Thank you for the answer. And is for you plausible a device like that moves? For example i fix laterally,does it rotate in circle?

Does the two class cilinders receive same downward force due to adhesion force of water? Thanks again

MarkE

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Re: Capillarity question
« Reply #3 on: May 03, 2015, 07:43:32 PM »
It has a potential energy minimum at some angle.  At that angle there will be no more net torque.

Gabriele

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Re: Capillarity question
« Reply #4 on: May 03, 2015, 08:27:12 PM »
Yes,bu the glass cilinder "feels" attraction force of the water like if the left case? This is what i ment

MarkE

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Re: Capillarity question
« Reply #5 on: May 03, 2015, 08:32:42 PM »
Yes,bu the glass cilinder "feels" attraction force of the water like if the left case? This is what i ment
I suggest that you visit the Museum of Unworkable Devices.  Take a look at their capillary action section..

Gabriele

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Re: Capillarity question
« Reply #6 on: May 03, 2015, 08:43:53 PM »
thanks