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Estimate the surface tension of an unknown solution, with a density similar to that of water, and using the approximated formula below, considering the capillary

Estimate the surface tension of an unknown solution, with a density similar to that of water, and using the approximated formula below, considering the capillary used has a radius of 0.5mm and resulting in a capillary rise of 1mm

Using the Capillary Rise method for measuring surface tension,

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