A rectangular trough, 1.7m long, 0.70m wide, and 0.45m deep, is completely full of water. One end of the trough has a small drain plug right at the bottom edge.
When you pull the plug, at what speed does water emerge from the hole?
As it is 0.45 m deep, by Bernoulli's principle,
v = sqrt(2gh)
Thus
v = 2.97 m/s [ANSWER]
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