# Waves and Sounds

## Terms

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Wave
Waves are a model for explaining the transfer of energy from one location to another without transferring matter
what is an echo
The reflection of sound wave off of a barrier ofr other reflective surface. The wave travels twice the distance to the barrier to return back to the source of the sound
Transverse waves
the particles vibrate perpendicular to the direction of travel.
what happens to the speed of sound as temperature changes
As the temperature increases the speed of sound increases the speed of sound increase acccording to the formula.
Trough
The bottom of a wave
what creates all wave motion? What creates sound waves?
vibrating
If the amplitude of a wave is 2 meters, what is the total top to bottom distance of the disturbance
double the amplitude or 4 meters
If a wave loses energy to what will happen to the wave
The amplitude of the wave decreases
medium
determines the speed of a wave/ carries the wave.
interference
A pattern formed by the overlapping of two or more waves that arrive in a region at the same time
wavelength
The distance from the top of the crest of wave to the of the following crest, or equivalently; the distance between succesive intentual parts of a wave
what are some everyday uses of reflected sound?
Ultrasound medical imaging, ultra sonic range finders on cameras,,sonar, etc.
transverse
A wave with vibration at right angles to the direction from a crest
Does sound travel faster in solid, liquid or gas
Solids>liquids>gases> The more rigidly fixed the molecules the faster the transmission of mechanical waves.
what is the difference between longitudnal and transverse waves
longitudinal and Transverse waves
If frequency triples what happenss to the wavelength(speed stays the same
wavelengh will decrease by 1/3
hertz
The Si unit of frequency one hertz is one vebration per second
compression
In mechanics, the act of squeezing material and reducing its volume.
Compressional or Longitudinal
he particles of a medium vibrateback and forth in the same direction(parallel) to the direction in which the waves travel.
Crest
The top or peak of a wave.
What are the two primary types of waves
mechanical waves and electromagnetic waves
Amplitude
The distance from equilibrium or rest position to the crest
wat are beats the result of
The recrring combination of consructive and desrucutive interference when two frequencies occur at the same time
period
The time required to orbit
Electromagnetic waves
Do not require a medium(ex. light, microwaves, x-rays)
Mechanical Waves
require a medium(examples: sound, water)
frequency
number of events per time; measured in hertz. Inverse of period
longitudinal
A wave in which the vibration is in the same direction the wave is traveling
What is resonance?
A vibration in an object when exposed to sound waves that match the natural frequency of the object
reflection
The bouncing back of a particle or wave that strikes the boundary between two media
What happens to a sound wave if the amplitude is decreased? Increased?
You decrease the energy carried in the wave when you decrease the amplitude, you increase the energy carried in the wave when you increase the amplitude
electromagnetic
magnet with a field produced by electric current; usually in the form of wire corled around a piece of iron
what type of wave is a sound wave
A sound wave can be described as both a mechanical wave and a longitudinal wave
IF a wave loses energy to heat, what will happen to the wave
decreases amplitude
Whaat occurs if sound waves have constructive interference with other waves? Destructive interference?
You increase the amplitude or loudness of the sound. You decrease the amplitude or it gets quieter

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