問題詳情
47. There is a laminar flow in a tube. When both the radius and length of the tube are doubled, how many times of flow resistanceis changed?
(A)
(B)
(C)
(D)
(E)
47. There is a laminar flow in a tube. When both the radius and length of the tube are doubled, how many times of flow resistanceis changed?
(A)