GGRA02H3 Lecture : GGRA02H3 Lecture 1 notes

The sound waves emanating from a loud event are traveling throughthe air at 341 m/s. If another event occurs that is only one-tenthas loud, how fast will its sound waves travel through the sameair?


ANSWER:_____________________ m/s

(a) What is the wavelength of a 1.10 kHz electromagnetic wave? (b) What is the wavelength of a 1.10 kHz sounds wave? (The speed of sound in air is 341 m/s.) (c) Can we hear a 1.10 kHz electromagnetic wave?

12. A large tuning fork is mounted on the back of a truck thatismoving away from the observer with a speed of 23 m/s. Theobserverhears a frequency of 1125 Hz. What is the actual vibrationfrequencyof the fork?

Speedof sound, v = 341 m/s.