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# pq15ans - fundamental frequency is the string vibrating n =...

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PHYS-1200 PHYSICS II FALL 2004 Post Quiz 15 Name___________ ANSWERS _________________ 1. y = (4.4 m) sin [(0.85 m -1 ) x – (1.5 s -1 ) t ] Which of the following waves will add with the above wave to produce sinusoidal standing waves? (Circle the correct answer.) y = (4.4 m) sin [(0.85 m -1 ) x + (1.5 s -1 ) t ] y = (4.4 m) sin [(0.85 m -1 ) x – (1.5 s -1 ) t ] y = (8.8 m) sin [(1.7 m -1 ) x – (1.5 s -1 ) t ] y = (4.4 m) cos [(1.7 m -1 ) x – (1.5 s -1 ) t ] y = (8.8 m) sin [(0.85 m -1 ) x – (1.5 s -1 ) t ] y = (8.8 m) sin [(0.85 m -1 ) x + (1.5 s -1 ) t ] y = (8.8 m) sin [(1.7 m -1 ) x + (1.5 s -1 ) t ]) 2. A standing wave on a 8.1 m string has a wavelength of 3.24 m. At what multiple of its
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Unformatted text preview: fundamental frequency is the string vibrating? n = L /( Î» /2) = 2 L / = 2(8.1 m)/(3.24 m) n = 5 3. Changing the phase constant Ï† in a wave has what effect? (Circle the correct answer.) It changes the wavelength of the wave. It shifts the wave so that it begins its cycle at a different place and/or time. It changes the maximum displacement of the wave. It changes the frequency of oscillation. It changes the direction of motion of the wave. It affects all of the quantities listed above. It affects none of the quantities listed above....
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