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Practice-Quiz1-2 - 2(1.5 pts All of the water from the...

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Physics 7B Practice Quiz 1 First two letters of last name: DL Section Number ____________ Name (last, first) ____________________________ Student ID _______________________ I certify by my signature that I will abide by the code of academic conduct of the University of California. Signature No books or notes. Calculators OK. Show all your work below. Answers alone do not receive credit! 1. (1.5 pts) If we have a large pipe of cross sectional area 0.5 m 2 , and water is flowing in it with a velocity of 3 m/s, what is the flow rate of the water (volume/time)?
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Unformatted text preview: 2. (1.5 pts) All of the water from the large diameter pipe in the previous problem is fed into a smaller pipe of cross sectional area 0.1 m 2 . a) What is the flow rate in the smaller pipe? b) What is the flow velocity? 3. (1.5 pts) If the pipes in the previous problems lie horizontally, in which pipe is the pressure greater, the larger-area or smaller-area one? Explain your reasoning, using Bernoulli’s Principle, in one sentence. continuity: I = A 1 v 1 = A 2 v 2 Bernoulli equation: Δ P+ Δ ( ½ρ v 2 )+ Δ ( ρ gh) = Δ E pump /vol - IR...
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