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A U-tube is made up of capillaries of bo...

A `U-`tube is made up of capillaries of bores `1 mm` and `2 mm` respectively. The tube is held vertically and partically filled with a liquid of surface tension `49 "dyne"//"cm"` and zero contact angle. Calculate the density of the liquid of the difference in the levels of the meniscus is `1.25 cm`.

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