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Phi is the tension properties of the surface of the liquid is what causes the surface portion of liquid to be attracted to (based on.) to another surface, such as the surface of the liquid part (including the drip drip of the sheep, or a round ball of mercury). Surface tension is caused by the appeal (appeal of molecules with identical molecules). When the molecules on the surface of the liquid is not surrounded by the same molecule in all aspects. The molecules are appealing to neighboring molecules on the surface more. Surface tension has the dimension of force per length of one unit or one unit of energy per area, both of which have the same value. But the energy per unit area, one is in terms of energy surface, which is a general term that applies to solids liquid rarely used in. In materials science Surface tension in stress free-energy surface, or surface.
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