oldHWK34 - oldhomewk 34 VALENCIA, DANIEL Due: Apr 28 2008,...

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oldhomewk 34 – VALENCIA, DANIEL – Due: Apr 28 2008, 4:00 am 1 Question 1, chap 16, sect 2. part 1 of 1 10 points The distance between two successive max- ima of a certain transverse wave is 1 . 72 m. Eight crests, or maxima, pass a given point along the direction of travel every 14 . 6 s. Calculate the wave speed. Correct answer: 0 . 942466 m / s (tolerance ± 1 %). Explanation: f = 8 14 . 6 s = 0 . 547945 Hz , and v = λ f = (1 . 72 m)(0 . 547945 Hz) = 0 . 942466 m / s . Question 2, chap 16, sect 2. part 1 of 3 10 points The time needed for a water wave to change from the equilibrium level to the crest is 0 . 5663 s. What fraction of a wavelength is this? Correct answer: 0 . 25 (tolerance ± 1 %). Explanation: The movement from the equilibrium level to the crest represents 1 4 of a wavelength. Question 3, chap 16, sect 2. part 2 of 3 10 points What is the period of the wave? Correct answer: 2 . 2652 s (tolerance ± 1 %). Explanation: The period T of the wave is thus T = 4 t = 2 . 2652 s Question 4, chap 16, sect 2. part 3 of 3 10 points What is the frequency of the wave? Correct answer: 0 . 441462 Hz (tolerance ± 1 %). Explanation: The frequency is f = 1 T = 0 . 441462 Hz Question 5, chap 16, sect 2. part 1 of 1 10 points A harmonic wave y = A sin[ k x - ω t - φ ] , where A = 1 meter, k has units of m - 1 , ω has units of s - 1 , and φ has units of radians, is plotted in the diagram below. +1 - 1 A (meters) t (seconds) 10 20 30 At the position x = 0 Which wave function corresponds best to the diagram? 1. y = A sin b k x - p 2 π 3 s P t - p 2 π 3 PB 2. y = A sin b k x - p 2 π 9 s P t - p 1 π 3 PB 3. y = A sin b k x - p 2 π 3 s P t - p 5 π 3 PB 4. y = A sin b k x - p 2 π 9 s P t - p 2 π 3 PB 5. y = A sin b k x - p 2 π 15 s P t - p 4 π 3 PB 6. y = A sin b k x - p 2 π 3 s P t - p 4 π 3 PB 7. y =
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oldHWK34 - oldhomewk 34 VALENCIA, DANIEL Due: Apr 28 2008,...

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