42. Water flows through a horizontal pipe and then out into the atmosphere, where d2/d1 = 2. The speed of the water at the output ofthe pipe is v1 = 10 m/s. The desity of water is 1g/cm3. What is the gauge pressure at the left section? (1 atm = 1.01 × 105 Pa )
(A) 4.6 atm
(B) 4.8 atm
(C) 5.0 atm
(D) 5.2 atm
(E) 5.4 atm