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## Homework Statement

i am asked to find the value of y in this question . I am not sure should i consider the atmospheric pressure acting on the mercury or not .

## Homework Equations

## The Attempt at a Solution

i choose to consider the atmospheric pressure as 0 in this case . So , my working is 30000 + (1.5x820x9.81) + (5 x1000x9.81) =13600(9.81)y , where y = 0.68m , am i right ? btw , i am not very sure about whether the pressure of water is (5 x1000x9.81) or not , because the outlet is not at bottom of teh tank , can someone exp;lain pls ?