528_Physics ProblemsTechnical Physics

528_Physics ProblemsTechnical Physics - 530 Superposition...

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530 Superposition and Standing Waves Section 18.2 Standing Waves P18.13 yx t A k x t == 150 0400 200 2 0 . sin . cos sin cos m af a f ω Therefore, k 2 π λ . r a d m 2 15 7 . . rad m m and ωπ = 2 f so f = ππ 2 200 2 31 8 rad s rad Hz . The speed of waves in the medium is vf f k = 2 2 200 500 rad s rad m ms . P18.14 y x t = F H G I K J 00300 2 40 .c o s c o s m (a) nodes occur where y = 0: x n 2 21 2 =+ so xn = 35 a f ππ π π ,,, . (b) y max o s . . = F H G I K J = 2 00294 m m P18.15 The facing speakers produce a standing wave in the space between them, with the spacing between nodes being d v f NN s m == = = 22 343 2800 0214 1 ej . If the speakers vibrate in phase, the point halfway between them is an antinode of pressure at a
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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