PHYSICS 1L03 Lecture 7: 7-Wave-Sound.pdf
5 Feb 2015
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6- waves, sound waves: a wave moves at a constant speed along a string. The periodic waves have a speed of 10. 0 cm/s. A and b are two points on the string. 1: a wave has a frequency of 58 hz and a speed of 31 m/s. Assume that the wave number is 2. 34 m 1, the angular frequency is 2. 88 rad/s, and that the wave is propagating in the + x direction at x = 1. 21 m. t. , and inside the angle bracket has a unit of radian here. } sin xk y. {hint: 1. 56 m, 3. 36 m, 5. 28 m, 6. 78 m, 9. 47 m, find the speed of a wave whose displacement is given by y. )0. 7 where x and y are in meters and t is in second: 2. 4 m, 3. 2 m, 4. 5 m, 5. 8 m, 7. 7 m. 2: a string stretched between two fixed points has a fundamental frequency of 100 hz.
