Unit 7 study guide: Waves and Sound
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31 Terms
If an upright pulse hits a solid boundary and is only reflected, what does the reflection look like?
the reflection will be inverted
if an upright pulse hits a loose boundary and is only reflected, what does the reflection look like?
the same/upright
Two transverse waves with amplitude 2m and 3m overlap. if their troughs are overlapping what will the resulting amplitude be? what kind of interference is this?
5m/ constructive interference/ 2+3=5m
If the crest of one and the trough of the other are overlapping what will the resulting amplitude be? what kind of interference is this?
destructive interference/ amplitude is reduced
what do waves transfer?
energy
what kind of wave is sound?
mechanical wave
what does the speed of sound depend on?
medium/ temperature
what does sound travel through the fastest?
solids
Velocity equation
v=f (times) wavelength
what do the arrows in the middle mean?
amplitude
The distance a wave moves during one vibration or cycle
wavelength
a disturbance that moves through space or through a medium (material)
wave
the number of cycles of vibrations per second
frequency
maximum distance from equilibrium position
amplitude
a wave that appears to stay in one place
standing wave
time required to complete one full cycle or vibration
period
audible sound?
any sound capable of being heard by the human ear
infrasonic sound
refers to sound waves with frequencies below 20 Hz, which is lower than the lower limit of human hearing
ultrasonic sound?
high-frequency acoustic waves (>20,000 Hz) above the human hearing range.
what does pitch depend on?
frequency
what does loudness depend on?
amplitude
what is the Doppler effect?
he change in frequency or wavelength of a wave (sound or light) for an observer moving relative to its source
what the equation for wavelength?
w(wavelength)
w=v (divided) f
highest point of transverse wave?
crest
lowest point of transverse wave?
through
frequency increase…. wavelength ??
decreases
wavelength decreases… frequency ???
increases
equation for the period of a wave? and frequency of a wave
T= time (divided) number(#) of waves
f= number(#) of waves (divided) by time
what happens to the wavelength if the frequency of PULSES is increased?
decrease
If there are 3 antinodes how many nodes are there?
4