流量(flow rate)物理题,求救水以 4 m/s的速度流过一直径为5CM的圆孔,what is the flow rate in m3/s?

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流量(flowrate)物理题,求救水以4m/s的速度流过一直径为5CM的圆孔,whatistheflowrateinm3/s?流量(flowrate)物理题,求救水以4m/s的速度流过一直径为5CM

流量(flow rate)物理题,求救水以 4 m/s的速度流过一直径为5CM的圆孔,what is the flow rate in m3/s?
流量(flow rate)物理题,求救
水以 4 m/s的速度流过一直径为5CM的圆孔,what is the flow rate in m3/s?

流量(flow rate)物理题,求救水以 4 m/s的速度流过一直径为5CM的圆孔,what is the flow rate in m3/s?
圆孔的面积为S=π(d/2)^2,v=4m/s,
每1s,流出的水的体积为V=Sv=0.00785m^3/s

3.14*0.05*0.05*4=0.0314 m^3/s
汗,竟然是直径……我算错了抱歉

设t=1s
则0.05^2*π*4*1=0.05π 立方米
所以是0.05π 立方米/s

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