Exam 6: Waves and Sound

Standing waves can be set up in a string when two waves that are

An increase of 20 dB increases the sound intensity by a factor of

A train sounding its horn is moving toward an observer. The pitch of the horn's sound relative to its normal pitch is

The minimum sound intensity that can be detected by the human ear is called the ______________ of hearing.

If a sound level increases by 40 dB, the intensity increases by a factor of ______________.

Approximately how many times faster is the speed of light in vacuum than the speed of sound in air?

Light waves travel fastest in

A Doppler red shift indicates

Wave period is the reciprocal of