Water flows through a pipe that narrows. What happens to the speed and the pressure of the water in the narrow section?
Answer and explanation
Correct answer: A. The speed increases and the pressure decreases
- Step 1: The continuity equation (A x v is constant) means that a smaller area gives a higher speed. Step 2. Bernoulli's principle then says the pressure drops. Answer: faster and lower pressure. Why not the others: speed and pressure move in opposite directions along a horizontal pipe.
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