- #1
KKuff
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Homework Statement
Here is the problem, I am able to calculate the velocity, but I don't know where to go from there.
A legendary Dutch boy saved Holland by plugging a hole in a dike with his finger, which is 1.10 cm in diameter.
(a) If the hole was 2.40 m below the surface of the North Sea (density 1030 kg/m3), what was the force on his finger?
(b) If he pulled his finger out of the hole, how long would it take the released water to fill 1 acre of land to a depth of 1 ft assuming the hole remained constant in size? (A typical U.S. family of four uses 1 acre-foot of water, 1234 m3, in 1 year.)
Homework Equations
P1 + (1/2)[itex]\rho[/itex]v12 + [itex]\rho[/itex]gy1 = P2 + (1/2)[itex]\rho[/itex]v22 + [itex]\rho[/itex]gy2
The Attempt at a Solution
I calculated the velocity to be 5.238 m/s, but I have no idea how to get force from this (for part a) or time (part b). Am I missing some other equations?
Thanks