Name: ______________________

Quiz 1

09/13/2004

Ch. 16.1-2

1) Sound waves travel with a speed of v =344 m/s in air.

a) What is the wavelength of a 440Hz sound wave?

b) What is the period of the same wave?

c) In steel sound waves travel faster v=6000 m/s. What is the wavelength of a 440Hz sound wave in steel?

2) The sound from lightning travels at 344 m/s, but the light travels at 3 x 10⁸ m/s. Thus the light arrives at your eyes before the sound arrives at your ears. If you count 3 sec. between seeing a lightning strike and hearing it, how far away was the lightning strike?