10.86 An air-conditioning system is designed to have a duct with a rectangular cross section 1 ft by 2 ft, as shown. During construction, a truck driver backed into the duct and made it a trapezoidal section, ás shown. The contractor, behind schedule, installed it anyway. For the same pressure drop along the pipe, what will be the ratio of the velocity in the trapezoidal duct to that in the rectangular duct? Assume the Darcy-Weisbach resis- tance coefficient is the same for both ducts. 1ft 0.70 ft -2 ft Before After
10.86 An air-conditioning system is designed to have a duct with a rectangular cross section 1 ft by 2 ft, as shown. During construction, a truck driver backed into the duct and made it a trapezoidal section, ás shown. The contractor, behind schedule, installed it anyway. For the same pressure drop along the pipe, what will be the ratio of the velocity in the trapezoidal duct to that in the rectangular duct? Assume the Darcy-Weisbach resis- tance coefficient is the same for both ducts. 1ft 0.70 ft -2 ft Before After
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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An air-conditioning system is designed to have a duct
with a rectangular cross section 1 ft by 2 ft, as shown. During
construction, a truck driver backed into the duct and made it a
trapezoidal section, as shown. The contractor, behind schedule,
installed it anyway. For the same pressure drop along the pipe,
what will be the ratio of the velocity in the trapezoidal duct to
that in the rectangular duct? Assume the Darcy-Weisbach resistance coefficient is the same for both ducts.

Transcribed Image Text:10.86 An air-conditioning system is designed to have a duct
with a rectangular cross section 1 ft by 2 ft, as shown. During
construction, a truck driver backed into the duct and made it a
trapezoidal section, às shown. The contractor, behind schedule,
installed it anyway. For the same pressure drop along the pipe,
what will be the ratio of the velocity in the trapezoidal duct to
that in the rectangular duct? Assume the Darey-Weisbach resis-
tance coefficient is the same for both ducts.
1 ft
0.70 ft
-2 ft-
Before
After
PROBLEM 10.86
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