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Unformatted text preview: lim (kl9356) Practice Problems 2 Weathers (17104) 1 This printout should have 36 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 3) 10.0 points You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0 . 18 m. Determine the frequency of these water waves. Answer in units of Hz. 002 (part 2 of 3) 10.0 points Determine the period of these water waves. Answer in units of s. 003 (part 3 of 3) 10.0 points Determine the speed of these water waves. Answer in units of m / s. 004 10.0 points The distance between two successive crests of a certain transverse wave is 1 . 31 m. Eight crests pass a given point along the direction of travel every 15 . 1 s. Calculate the wave speed. Answer in units of m / s. 005 10.0 points Earthquakes produce two kinds of seismic waves: The longitudinal primary waves (called P waves) and the transverse secondary waves (called S waves). Both S waves and P waves travel through Earths crust and mantle, but at different speeds; the P waves are always faster than the S waves, but their exact speeds depend on depth and location. For the pur pose of this exercise, we assume the P waves speed to be v P = 8990 m / s while the S waves travel at a slower speed of v S = 5320 m / s. Suppose a seismic station detects a P wave and then t = 87 . 9 s later detects an S wave. How far away is the earthquake center? An swer in units of km. 006 10.0 points A wave is sent along a long spring by mov ing the left end rapidly to the right and keep ing it there. The figure shows the wave pulse at QR  part RS of the long spring is as yet undisturbed. P S P Q R S Which of the graphs correctly shows the relation between the original position x of each point of the spring and the corresponding displacement x of that point? (Displacements to the right are positive.) 1. x x 2. x x 3. x x 4. None of these graphs is correct. 5. x x 6. lim (kl9356) Practice Problems 2 Weathers (17104) 2 x x 7. x x 007 (part 1 of 3) 10.0 points A transverse wave of frequency 50 Hz propa gates down a string. Two points 30 cm apart are out of phase by 3 4 . What is the wave length of the wave? An swer in units of cm. 008 (part 2 of 3) 10.0 points At a given point, what is the phase difference (as a multiple of ) between two displace ments for times 7 . 5 ms apart? Answer in units of ....
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 Fall '08
 Weathers
 Magnetism

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