A vertical unifrom U tube open at both ends contains mercury. Water is poured in one limb until the level of mercury is depressed 2 cm in that limb. What is the length of water column when this happens.
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if level of mercury is depressed 2cm in one limb, then total difference in height of mercury columns is 4cm. so pressure by 4cm of mercury column is provided by x cm of water. so ve have
⇒4×13594=x×1000
⇒x=54.376cm≈54.4cm
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