A microscope slide measures \( 6.0 \mathrm{~cm} \times 1.5 \mathrm{...

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A microscope slide measures \( 6.0 \mathrm{~cm} \times 1.5 \mathrm{~cm} \times 0.20 \mathrm{~cm} \). It is suspended with its face vertical and with its longest
\( \mathrm{P} \) side horizontal and is lowered into a liquid until it is

W. half immersed. Its apparent weight is then found to be the same as its weight in air. Calculate the surface tension of liquid in \( 10^{-3} \mathrm{~N} / \mathrm{m} \), assuming the angle of contact to be zero. Density of liquid is \( 1000 \mathrm{~kg} / \mathrm{m}^{3} \). Round off to nearest integer.
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