9.22 An atmospheric boundary layer is formed when the windblows over the earth's surface. Typically, such velocity profilescan be written as a power law: u ay, where the constants a andn depend on the roughness of the terrain. As is indicated in Fig.P9.22, typical values are n = 0.40 for urban areas, n = 0.28 forwoodland or suburban areas, and n = 0.16 for flat open country(Ref. 23). (a) If the velocity is 20 ft/s at the bottom of the sail onyour boat (y 4 ft), what is the velocity at the top of the mast(y 30 ft)? (b) If the average velocity is 10 mph on the tenth450E 300150FIGURE P9.22

Answered: Image /qna-images/answer/a9ae411a-1664-4280-a2a9-1af7d1550adb.jpg

can be written as a power law: u a n depend on the roughness of the te P9.22, typical values are n = 0.40 f woodland or suburban areas, and n (Ref. 23). (a) If the velocity is 20 ft/ your boat (y 4 ft), what is the ve (y=30 ft)? (b) If the average velo 0.40 0.28 450 E 300

can be written as a power law: u a n depend on the roughness of the te P9.22, typical values are n = 0.40 f woodland or suburban areas, and n (Ref. 23). (a) If the velocity is 20 ft/ your boat (y 4 ft), what is the ve (y=30 ft)? (b) If the average velo 0.40 0.28 450 E 300

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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