m 1. A river is 12.2 m wide with an average depth of 5.1 m. The river is flowing at a speed of 1.7 At one point in the river, there is a section of rapids. Here, the speed of the water increases to a. -3.6 . What is the effective area of the river at this point? b. Later, the river dumps into a lake where the area rapidly increases to 202 m2. How fast is the water moving just after it enters the lake?

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Chapter11: Fluid Statics
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## Fluid Dynamics

### Problem 1

A river is 12.2 m wide with an average depth of 5.1 m. The river is flowing at a speed of \(1.7 \, \frac{m}{s}\).

a. At one point in the river, there is a section of rapids. Here, the speed of the water increases to \(3.6 \, \frac{m}{s}\). What is the effective area of the river at this point?

b. Later, the river dumps into a lake where the area rapidly increases to \(202 \, m^2\). How fast is the water moving just after it enters the lake?
Transcribed Image Text:## Fluid Dynamics ### Problem 1 A river is 12.2 m wide with an average depth of 5.1 m. The river is flowing at a speed of \(1.7 \, \frac{m}{s}\). a. At one point in the river, there is a section of rapids. Here, the speed of the water increases to \(3.6 \, \frac{m}{s}\). What is the effective area of the river at this point? b. Later, the river dumps into a lake where the area rapidly increases to \(202 \, m^2\). How fast is the water moving just after it enters the lake?
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