試題詳解

15. An ideal fluid flows through a horizontal pipe whose diameter varies along its length. Measurements would indicate that the sum of the kinetic energy per unit volume and pressure at different sections of the pipe would __________.
(A) decrease as the pipe diameter increases
(B) increase as the pipe diameter increases
(C) increase as the pipe diameter decreases
(D) decrease as the pipe diameter decreases
(E) remain the same as the pipe diameter changes