College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question
Please help me with question 8.40
number. Under what circumstances might it be advantageous to have turbulent rather than laminar pipe flow? A garden hose is attached to a faucet that is fully opened. Without a nozzle on the end of the hose, the water does not shoot very far. However, if you place your thumb over a portion of the end of the hose, it is possible to shoot the water a considerable distance. Explain this phenomenon. (Note: The flowrate decreases as the area covered by your thumb increases.) 8.40 8.41 Air at standard temperature and pressure flows through a 1-in.-diameter galvanized iron pipe with an average velocity of 8 ft/s. What length of pipe produces a head loss equivalent to (a) a flanged 90° elbow, (b) a wide-open angle valve, or (c) a sharp-edged entrance? 8.47
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Transcribed Image Text:number. Under what circumstances might it be advantageous to have turbulent rather than laminar pipe flow? A garden hose is attached to a faucet that is fully opened. Without a nozzle on the end of the hose, the water does not shoot very far. However, if you place your thumb over a portion of the end of the hose, it is possible to shoot the water a considerable distance. Explain this phenomenon. (Note: The flowrate decreases as the area covered by your thumb increases.) 8.40 8.41 Air at standard temperature and pressure flows through a 1-in.-diameter galvanized iron pipe with an average velocity of 8 ft/s. What length of pipe produces a head loss equivalent to (a) a flanged 90° elbow, (b) a wide-open angle valve, or (c) a sharp-edged entrance? 8.47
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