P18_084 - problem tells us that t s − t r = 0 12 s = ` µ 1 v s − 1 v r Thus with v s = 343 m/s and v r = 15 v s = 5145 m/s we Fnd ` = 44 m.

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84. Let ` be the length of the rod. Then the time of travel for sound in air (speed v s ) will be t s = `/v s .And the time of travel for compressional waves in the rod (speed v r ) will be t r = `/v r . In these terms, the
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Unformatted text preview: problem tells us that t s − t r = 0 . 12 s = ` µ 1 v s − 1 v r ¶ . Thus, with v s = 343 m/s and v r = 15 v s = 5145 m/s, we Fnd ` = 44 m....
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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