Discussion
A stack of \( 2.0 \) m diameter passes \( 47 \) m\(^3\)/s. The exit velocity is
Answer: B
Correct answer: 15.0 m/s
\[ A = \frac{\pi d^2}{4} = \frac{\pi (2.0)^2}{4} = 3.14\ \text{m}^2 \]\[ v = \frac{Q}{A} = \frac{47}{3.14} = 15.0\ \text{m/s} \]
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