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5. a/ The pitch "concert A" has a frequency of 440 Hz. What is the wavelength of a sound wave with this frequency? Use the speed of sound at STP. b/ The "A" above concert A has a frequency that is double that of concert A. What is its wavelength? 6. a/ If the frequency of a wave is doubled while the speed stays the same, what happens to its wavelength? b/ If the frequency of a wave is tripled while the speed stays the same, what happens to its wavelength? c/ Look at the equation: v =fi. If v is constant, what is the relationship between f and 2? 7. The wave shown at right is plotted as amplitude vs. time. Remember that the period of a wave is the time needed to complete one cycle. What is the period of the wave shown at right? 20 10 0.25 s 0.50s If its speed is 40. m/s, what is its wavelength? 8. Otis sits on the dock of a bay and watches 12 water waves go by in 3.0 seconds. Successive crests on the waves are 0.60 meters apart. Find the following quantities for this wave. a/ the frequency b/ the period c/ the wavelength d/ the speed 9. A ship sends out a sound wave downward into the water. The speed of sound in water is approximately 1500 m/s. The sound wave travels to the bottom, bounces off, and returns to the ship in a total time of 0.67 s. What total distance did it the sound wave travel? How deep is the water? 10. A tourist claps her hands at the Grand Canyon. Assume standard temperature and pressure. The far wall of the canyon is 200. m away. How much later after the clap will the echo return