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当前学科:第六章流体力学
题目:
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]梯形断面水渠按均匀流设计,已知过水断面A=5.04m
2
,湿周x=6.73m,粗糙系数n=0.025,按曼宁公式计算谢才系数为()。
A . 30.8m
1/2
/s
B . 30.13m
1/2
/s
C . 38.8m
1/2
/s
D . 38.13m
1/2
/s
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