Oscillations and Waves Flashcards
1
Q
periodic motion
A
motion of an object that regularly returns to a given position after a fixed time interval
2
Q
damped oscillations
A
amplitude decreases over time and motion ultimately ceases
3
Q
longitudinal waves
A
elements of disturbed medium move parallel to direction of propagation
4
Q
transverse waves
A
elements of disturbed medium move perpendicular to direction of propagation
5
Q
audible sound
A
20Hz to 20kHz
6
Q
infrasonic waves
A
< 20Hz
7
Q
ultrasonic waves
A
> 20kHz
8
Q
threshold of pain
A
120dB
9
Q
threshold of hearing
A
0dB
10
Q
Doppler Effect
A
apparent change in frequency (or wavelength) due to motion of source or observer of wave
