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Solved: Water pressure inside a hose nozzle can be less
Chapter 12, Problem 21(choose chapter or problem)
Problem 21CQ
Water pressure inside a hose nozzle can be less than atmospheric pressure due to the Bernoulli effect. Explain in terms of energy how the water can emerge from the nozzle against the opposing atmospheric pressure.
Questions & Answers
QUESTION:
Problem 21CQ
Water pressure inside a hose nozzle can be less than atmospheric pressure due to the Bernoulli effect. Explain in terms of energy how the water can emerge from the nozzle against the opposing atmospheric pressure.
ANSWER:
Solution
Step 1
In this problem from Bernoulli’s equation.
Where P= pressure, density, and V= volume.
Where P1 and P1 are equal to atmospheric pressure. Let P1 be the atmospheric pressure at top of reservoirs and P2 be the atmospheric pressure that is emerging water which is surrounded by the atmospheric and cannot have pressure.
Solving for we get
where h=h1-h2
where h is the height dropped by the water.
