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Now let's say that the left side of the equation is the top of the tank and the right side of the equation is the bottom of the tank. The origin is at the bottom of the tank.

We can say that [tex]P_a = P_{atm}, v_a \approx 0, h_b = 0[/tex]

Therefore, our equation becomes

[tex]P_{atm} + pgh = P_{bottom of tank} + 1/2pv^2 [/tex]

Now torricelli's law states that [tex] v = \sqrt{2gh} [/tex], which we only get if we neglect the difference in pressure. Is that true? When I looked up torricelli's law, they said that the only thing neglected was viscosity and nothing about the change in pressure. What am I doing wrong?

Thanks in advance!