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8_16 - 8.16 Water ﬂows downhill through a...

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Unformatted text preview: 8.16 Water ﬂows downhill through a 3-in.~diametei‘ steel pipe, The slope. of the hill is such that for each mile (5280 ft) of horizontal distance, the change in elevation is Az l’t. Determine the maximum value of Az if the ﬂow is to remain laminar and the pressure all along the pipe is constant. For kiln/17M flow V: 13%:3 QWLL (I) W/Ier‘e for MA; case 771V: 0‘: ,5, 3 1' 34X/0 W E—VQ mg or y 2/00 _:2/vo( 2 mm £2 M64 {151 (a. 25%,!) Hence from Eg [/Jf 3 6’ .3ng 31(2.3«X/05¢§f){0/W%£) _’ -5 1/7 =-— 3'01 -—-——~——M --——~——-——-— -— ~/.7i‘/t/0 62-479,; (czszarﬁ‘fz or =:/ .029 =' «(5290190 x {—Aﬁcxm‘s) = (2/02 ff /l/o/e-' Cay/cl we 7%49 ape/y] 670474017 l/ 2/...f—g—i-d; :22 pun/ﬂ ﬂe"2/ﬂﬂ 571:? 7%47Z V: 0./0/:f’7l and )0- 66‘, 54‘ 7?; 1/00 7— 0, (7306’ and 052%}; 7% mm Pew/7’: 2, ~22 = (2/02. f/ 8--l3 ...
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