# May 4 - Cory Poynter Homework May 4 16-2, 3, 7, 9, 12, 15,...

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Cory Poynter Homework May 4 4/30/2009 16-2, 3, 7, 9, 12, 15, 22, 35 2) , =. (. yx t 8msin 628x - ) vt Velocity (v) = 1.20m/s a) t= 0 , =. (. ) yx t 8msin 628x b) t = 2s; v = 12m/s; so that vt= 2.4m , =. (. yx t 8msin 628x - . ) 2 4m The distance between the crest to crest distances is same. The phase difference changes by π2 . The amplitudes of the waves are opposite to each other.

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Homework May 4 4/30/2009 3) R = . 6 37 x 106m a) Only P wave travels reaches point B faster than Rayleigh wave, because P travels at a constant speed of 7.80km/s as compared to 4.50 km/s. b) wave P = ° 2 x R x sin30 = ( . ) ° 2 x 6 37 x 106m x sin30 = . 6 37 x 106m Speed of wave = 7800m/s = . ( ) / 6 37 106m 7800m s =816667s Travel a distance = = Rπ3rad = . 6 37 x 106m Speed of wave = 4500m/s = . ( ) / 6 37 106m 4500m s =1482s Difference between the wave = (1482 -817) = 665s 7) oscillations generated in 30s = 40 Oscillations generated in 1s = 4/3 Frequency = 4/3Hz
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## This note was uploaded on 07/13/2011 for the course PHYS 203 taught by Professor Turner during the Spring '11 term at Alabama.

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May 4 - Cory Poynter Homework May 4 16-2, 3, 7, 9, 12, 15,...

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