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Surface Tension Measurements Using the Drop …
Surface Tension Measurements Using the Drop Shape Method By Roger P. Woodward, First Ten Angstroms, 465 Dinwiddie Street, Portsmouth, VA 23704 Tel: Fax: email: Drop shape analysis is a convenient way to measure Surface Tension . The principal assump-tions are The drop is symmetric about a central vertical axis: this means it is irrelevant from which direction the drop is viewed. The drop is not in motion in the sense that viscosity or inertia are playing a role in determining its shape: this means that Surface (or interfacial) Tension and gravity are the only forces shaping the drop. The two principal practical advantages of the technique are Calibration is straightforward in that only optical magnification is needed. This can be measured with high accuracy and is easy to trace to national standards.
Surface Tension Measurements Using the Drop Shape Method By Roger P. Woodward, Ph.D. First Ten Angstroms, 465 Dinwiddie Street, Portsmouth, VA 23704
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