試題詳解

45. Water pressurized to 3.5 × 10⁵ Pa is flowing at 5.0 m/s in a horizontal pipe which contracts to 1/3 its former area. What are the pressure and flow speed of the water after the contraction?
(A) 2.5 × 10⁵ Pa, 15 m/s
(B) 3.0 × 10⁵ Pa, 10 m/s
(C) 3.0 × 10⁵ Pa, 15 m/s
(D) 4.5 × 10⁵ Pa, 1.5 m/s
(E) 5.5 × 10⁵ Pa, 1.5 m/s