A “Y”-shaped tube is inserted upside down so that the left
foot and right foot are immersed in two kinds of liquid.
After both feet are immersed in the liquid, then the top of
the Y pipe is closed with the finger and pulled upwards,
so that the two legs of the Y pipe are filled with a column
of different high-density liquids. If the density of the first
liquid is 0.80 gram.cm-3 and the second density is 0.75
gram.cm-3, if the first liquid column has a high of 8 cm,
then determine the height difference between the two
liquid columns on U pipe.
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