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Unformatted text preview: If the water is to rise 25 m (82 feet) above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? p = gh = (1000 kg/m 3 )(9.8 m/s 2 )(25 m) = 245,000 Pa. Chapter 6 Exercises 12. When you mix milk or sugar into your coffee, you should move the spoon quickly enough to produce turbulent flow around the spoon. Why does this turbulence aid mixing? If you do not produce a turbulent flow then the things you are mixing will form a pattern of flow which will not help them mix. When you do cause turbulence the mix properly because small portions of each ingredient mix. Problems 4. You are trying to paddle a canoe silently across a still lake and know that turbulence makes noise. How quickly can the canoe and the paddle travel through water without causing turbulence? v = ((2300)(0.001 kg/m . s))/((1000 kg/m 3 )(1 m)) = 0.002 m/s...
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- Spring '07