本题目来源于试卷: Physics Unit10: Fluids Related Topics，类别为 通用国际物理
[单选题]
Water flows through a horizontalz4sty55q c 6ve pipe of cross-sectional argnsno m6yi ;6:ea $10.0 \; cm^{2}$ at a pressure of 0.250 atm. The flow rate is $1.00 \times 10^{-3} \; m^{3}/s$. At a valve, the effective cross-sectional area of the pipe is reduced to $5.00 \; cm^{2}$. What is the pressure at the valve?
A. $0.112 \; atm$
B. $0.157 \; atm$
C. $0.200 \; atm$
D. $0.235 \; atm$
参考答案: D
本题详细解析:
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