Mr. Bosworth General Physics Name_____________________ Sound Worksheet #1 Period_____ 1. What is the speed of sound in air at 17.5 °C? Answer_______________________ 2. What is the speed of sound in air at -50.0 ˚C? Answer_______________________ 3. What is the temperature of air if sound is traveling at 361 m/s? Answer_______________________ 4. What is the wavelength of a sound wave that is traveling at 342 m/s and has a frequency of 6008 Hz? Answer_______________________ 5. Waves in a lake are 5.00 m apart and pass and anchored boat every 1.25 s. What is the speed of the waves? Answer_______________________

6. A mine explodes at sea. There is a 5.00 s difference between the sound arriving through the water and the sound arriving through the air. If the speed of sound in water is 1531 m/s, how far away is the receiver from the explosion? Answer_______________________ 7. A wave on a guitar string has a speed of 348 m/s and a period of 3.91 X 10-3 s. What is the wavelength of the string? Answer_______________________ 8. An airplane is flying horizontally at 800 km/hr at an altitude of 2.50 km. When the sound of the airplane’s engines appears to a person on the ground to come from directly overhead, how far away from a person is a point directly under the plane? Answer_______________________ 9. The temperature of a room is 38.0 ˚C. (a) What is the wavelength of a 12000 Hz frequency in the room? (b) What is the wavelength if the temperature changes to -38.0 ˚C? Answer (a)_______________________ Answer (b)_______________________