Water flows through a smooth circular pipe of diameter D and length L because of a pressure difference ΔP across the length. The volume flow rate is Q and the flow is turbulent with Reynolds number 105. If the pressure difference is increased to 4 ΔP the volume flow rate will be

Water flows through a smooth circular pipe of diameter D and length L

1.	Water flows through a smooth circular pipe of diameter D and length L because of a pressure difference ΔP across the length. The volume flow rate is Q and the flow is turbulent with Reynolds number 105. If the pressure difference is increased to 4 ΔP the volume flow rate will be
A.	2Q
B.	A little more than 2Q
C.	A little less than 2Q
D.	4 Q
Answer» B. A little more than 2Q