13_InstSolManual_PDF_Part11

13_InstSolManual_PDF_Part11 - Fluid Mechanics 13-11 13.52...

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13.52. Set Up: The fluid is water, so Solve: (a) (b) so 13.53. Set Up: Solve: Then and 13.54. Set Up: The two points are close together so we can neglect Solve: so 70% is blocked. 13.55. Set Up: Solve: Reflect: The gauge pressure is higher at the second point because the water speed is less there. 13.56. Set Up: At the terminal speed, and the forces balance. The viscous drag force is The weight of the ball bearing is The density of steel is Solve: 13.57. Set Up: The viscous drag force is The weight of the ball bearing is Solve: gives v t 5 r 2 g r 18 h 5 1 3.00 3 10 2 3 m 2 2 1 9.80 m / s 2 21 19.3 3 10 3 kg / m 3 2 18 1 0.986 N # s / m 2 2 5 0.0959 m / s 5 9.59 cm / s. 6 ph r v t 5 1 3 p r 3 r g . F 5 1 4 mg mg 5 4 3 p r 3 r g . F 5 6 ph r v t . v t 5 2 r 2 g r 9 h 5 2 1 1.00 3 10 2 3 m 2 2 1 9.80 m / s 2 21 7.8 3 10 3 kg / m 3 2 9 1 0.150 N # s / m 2 2 5 0.113 m / s. r 5 7.8 3 10 3 kg / m 3 . mg 5 4 3 p r 3 r g . 6 ph r v t . a 5 0 p 2 5 p 1 1 1 2 r 1 v 1 2 2 v 2 2 2 5 1.80 3 10 4 Pa 1 1 2 1 1000 kg / m 3 213 2.50 m / s 4 2 2 3 1.25 m / s 4 2 2 5 2.03 3 10 4 Pa v 2 5 v 1 1 A 1 A 2 2 5 1 2.50 m / s 2 1 A 1 2 A 1 2 5 1.25 m / s.
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