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  2. Washburn's equation - Wikipedia

    en.wikipedia.org/wiki/Washburn's_equation

    Washburn's equation is also used commonly to determine the contact angle of a liquid to a powder using a force tensiometer. [ 5 ] In the case of porous materials, many issues have been raised both about the physical meaning of the calculated pore radius r {\displaystyle r} [ 6 ] and the real possibility to use this equation for the calculation ...

  3. Contact angle - Wikipedia

    en.wikipedia.org/wiki/Contact_angle

    Cloth, treated to be hydrophobic, shows a high contact angle. The theoretical description of contact angle arises from the consideration of a thermodynamic equilibrium between the three phases: the liquid phase (L), the solid phase (S), and the gas or vapor phase (G) (which could be a mixture of ambient atmosphere and an equilibrium concentration of the liquid vapor).

  4. Captive bubble method - Wikipedia

    en.wikipedia.org/wiki/Captive_bubble_method

    The captive bubble method is a method for measuring the contact angle between a liquid and a solid, by using drop shape analysis. [1] In this method, a bubble of air is injected beneath a solid, the surface of which is located in the liquid, instead of placing a drop on the solid as in the case of the sessile drop technique.

  5. Sessile drop technique - Wikipedia

    en.wikipedia.org/wiki/Sessile_drop_technique

    An alternative method for measuring the contact angle is the Wilhelmy method, which employs a sensitive force meter of some sort to measure a force that can be translated into a value of the contact angle. In this method, a small plate-shaped sample of the solid in question, attached to the arm of a force meter, is vertically dipped into a pool ...

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    I saw this one next to it at 45 and they were identical and it had good reviews." Related: Man Steals Fiancée's Christmas Gift Idea for Himself; Now She's Having Doubts About Their Future.

  7. Savings interest rates today: Best accounts still paying out ...

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    The FDIC is an independent government agency charged with maintaining stability and public confidence in the U.S. financial system and providing insurance on consumer deposit accounts.

  8. Assad makes first public statement after Syria ouster. What ...

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    Syrian leader Bashar Assad issued what appeared to be his first public statement since he was ousted and fled with his family to Russia more than a week ago.

  9. Edward Wight Washburn - Wikipedia

    en.wikipedia.org/wiki/Edward_Wight_Washburn

    Edward Wight Washburn (May 10, 1881 – February 6, 1934) was an American chemist. Washburn was born in Beatrice , Nebraska , in the family of William Gilmor Washburn, a lumber and brick merchant.

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