Class Management Help 11W#12 Begin Date: 7/28/2017 5:00:00 PM-Due Date: 8/1/2017
ID: 1635056 • Letter: C
Question
Class Management Help 11W#12 Begin Date: 7/28/2017 5:00:00 PM-Due Date: 8/1/2017 11:59:00 PM End Date: 8/1/2017 11:59:00 PM (8%) Problem 5: Water flows smoothly through a pipe with various circular cross- sections of diameters 2D, 6D, and D, respectively 2 2D 6D ©theexpertta.com 25% Part (a) In which section is the volume flow rate largest? Choose the best answer Grade Summary Deductions Potential OSection 3 OSection OSection 2 O They are the same 0% 100% Submissions Attempts remaining: 4 (0% per attempt) detailed view Submit Hint I give up! Hints: 1 % deduction per hint. Hints remaining: 3 Feedback: 3% deduction per feedback. 25% Part (b) In which section is the speed of the water largest? Choose the best answer 25% Part (c) What is the ratio of the speed in section 3 to the speed in section 1? 25% Part (d) In which section is the pressure largest? Choose the best answerExplanation / Answer
1. Volume flow rate in a flow remains constant throughout, comforming to the law of conservation of mass
so they are the same
2. since spped of water is directly proportional to flow rate and inversly proportional to the cross section of the pipe
the speed of water is fastest in the third part of the pipe with diamerter D
3. speed in section 3/speed in section 1 = area of section 1 / area of secxtion 3 = 4 : 1
4. pressure is largest where velocity is slowest
so the presuure is largerst in the middle portions of the puipe