Physical Science Flashcards
Quiz 5
what is the periodic disturbance- back and forth motion of some kind
wave
which waves travel through matter
mechanical waves
what are magnetic and electric fields that can travel through a vacuum as well as matter
electromagnetic waves
what type of waves are water waves
circular waves
which waves need a medium
mechanical waves
which waves transmit energy but not matter
circular waves
what are waves moving perpendicular to the direction of travel
transverse waves
what are waves moving parallel to the direction of travel
longitudinal waves
what types of waves is water waves a combination of
transverse and longitudinal
what is the distance from crest to crest (tops)and trough to trough (bottom)
wavelength
what is the number of crests per second
frequency
what is frequency measured in
hertz
what is how high or low a sound is
pitch
what is the time needed for a complete wave to pass
period
what is the height of the crest from the undisturbed level
amplitude
what are waves interfering to produce a defined pattern
standing waves
what are areas of no displacement
nodes
what are areas of max displacement
antinodes
what sound is below audible frequency (<20 Hz)
infrasonic
what sound is above audible frequency (>20,000 Hz)
Ultrasonic
what is sound navigation ranging
SONAR
what is measured in decibels (dB)
sound
what is the changing of frequency caused by motion
Doppler effect
what does the doppler effect produce
a change in pitch