P15_053 - 53. (a) The friction force is f = = Ap = w ghA...

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53. (a) The friction force is f = A p = ρ w ghA = ( 1 . 0 × 10 3 kg / m 3 )( 9 . 8m / s 2 ) (6 . 0m) ³ π 4 ´ (0 . 040 m) 2 =74N . (b) The speed of water flowing out of the hole is v = 2 gh . Thus, the volume of water flowing out of
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