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Unformatted text preview: as an echo. What is the frequency of the echo that you hear? a. lower than f b. equal to f c. higher than f but lower than f 1 d. equal to f 1 e. higher than f 1 4. The traces below show beats that occur when two different pairs of waves interfere. For which case is the difference in frequency of the original waves greater? a. pair 1 b. pair 2 c. same for both pairs d. impossible to tell by just looking Task 2. Book Problems. 1. Chapter 15, Problem 19. 2. Chapter 15, Problem 52. Task 3: Police Car Siren Consider three cases in which the relative speed of a siren is 30 m/s with respect to you. For each case, determine the frequency that you hear. The siren emits a frequency of 300 Hz. A. You are at rest, and the siren is moving away at 30 m/s. B. Siren is at rest, and you are moving away at 30 m/s. C. Siren is in front of you and moving at a velocity of 45 m/s and you are moving at a velocity of 15 m/s. Pair 1 Pair 2...
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This note was uploaded on 04/07/2009 for the course EF 152 taught by Professor Ab during the Spring '08 term at University of Tennessee.
- Spring '08