bfinalsoln_10 - A = 2 /5 A = 2 / Physics 9B-C Final Exam...

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Unformatted text preview: A = 2 /5 A = 2 / Physics 9B-C Final Exam Solutions Cole, UC Davis 20pointsperproblem/160pointstotal [1](a)remainthesame(b)slope(c)particle(d)halve(e)latentheat(f)negative(g)top (h)0(i)hotter(j)odd. [2]a)(5pts)Forawavetravelingtotheleft y t = v y x . y t v y x = b)(15pts)Makingthesubstitution u = kx + t sothat : y x = dy du u x = k dy du and y t = dy du u t = + dy du .Plugginginto y t v y x = dy du v k dy du = . v = /k ,so-=0. [3]a)(10pts) P = F y x y t Findtheforce: v = F F=v 2 = (0.020kg/m)(80m/s) 2 F= 128N.Findthederivatives: y x = kA sin kx kvt ( ) ; y t = kvA sin kx kvt ( ) where k = 2 =5.24m-1 Subbingintothepower: P = Fk 2 vA 2 sin 2 kx kvt ( ) = = 128 N ( ) 5.24 m 1 ( ) 2 80 m/s ( ) 0.03 m ( ) 2 sin 2 5.24 m 1 ( ) x 419 s...
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This note was uploaded on 09/28/2011 for the course PHY 9B PHY9AFQ201 taught by Professor Stevn during the Winter '11 term at UC Davis.

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bfinalsoln_10 - A = 2 /5 A = 2 / Physics 9B-C Final Exam...

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