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khfrekek92
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Homework Statement
the tank has a radius of 2m, containing an initial water level of 3m. A hole at the very bottom (underneath) of the tank has radius .005m. How long will it take to empty the tank?
Homework Equations
Bernoulli's principle.
A=radius at top of tank
a=radius of drain hole
The Attempt at a Solution
after solving V=sqrt(2gh) [at the hole in the bottom], i set dV/dt=--a*sqrt(2gh), so A(dy/dt)=-a*sqrt(2gh). After integrating both sides and solving for C, I got that (A/g)sqrt(2gh)=-8at+(A/g)sqrt(6g)
Then I plugged everything in with h=0 and got that t=15649.2sec=4.35 hours.
Did I do this right? Did you get the same answer?
Thanks so much in advance! I appreciate it!