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help with bernoulli's equation?
one evening,a husband and wife are working in their garden. While watering the grass, the wife holds the hose horizontally and the water flows from the end if the hose. She twists the nozzle if the hose to partially close it and suddenly the water shoots farther from the end of the hose. This seems odd to her husband, who wonders, "Why doesn't the stream of water travel farther since it appears that less water is flowing from the end of the hose?"
What assumption is built into the wording of the problem that becomes unnecessary if you use bernoulli's equation?
1 Answer
- Anonymous1 decade agoFavorite Answer
the incorrect assumption of the husband is that the distance the water shoots is related to the volume of water coming out of the hose. by bernoulli's equation the speed of the water in the flow is related to the water pressure differential at the nozzle, and as the nozzle is closed, the pressure in the hose increases and the flow velocity of the smaller quantity of is greater because of the increased pressure.