Definitions
What is a trough?
A trough is the lowest point on the wave.
What is a transverse wave?
A way in which the medium vibrates at right angles to the direction the wave travels.
What is amplitude?
The amplitude of a wave is the maximum displacement of the medium from it's rest.
Sound energy is energy that moves in waves through matter from a still object.
False: Sound is engergy that moves in waves through matter from a vibrating object. (pg 311, Natural Notes)
Light travels faster than sound.
True (pg 327, bottom)
What is sonic boom?
The thunderlike sound produced as a result of the object traveling at or above Mach 1.
What is a mechanical wave?
A disturbance in matter that transfers energy through the matter.
What is a wavelength?
Wavelength is the distance between a point on one cycle of the wave and the same point on the next cycle.
What kind of waves does sound travel by?
longitudinal waves
Oscillate means to travel in one direction.
False. Sound energy causes air to oscillate or vibrate back and forth. (like the air that blew out the candle.
What is pitch?
An indication of how high or low a sound is, which is primarily determined by the frequency of the sound wave.
What kind of wavelengths have greater frequencies?
Shorter wavelengths have greater frequencies.
What is the equation for wave speed?
speed = wavelength x frequency
Sound intensity depends on what part of the wave?
Sound intensity depends on the waves amplitude.
The more energy a wave has, the greater it is amplified.
True
What is the doppler effect?
A change in sound frequency caused by the motion of the sound source, motion of the listener; or both
What is the medium of a wave?
The matter through which a wave travels.
What is the frequency of a wave?
Frequency is the humber of complete cycles in a given time.
What is the equation for the speed of sound in air?
v = (331.5 + 0.6 x T) m/s.
The wavelength and the frequncy are proportional to one another.
False: wavelength and frequency are inversely proportionals to onthe another (when one gets large the other gets small)
What is a Hertz?
a unit of measurement for frequency.
What are the parts of a transverse wave?
The parts of a transverse wave are: source, crests, trough and amplitude.
_____ and wavelength are related to one another through the speed of the wave.
frequency
What are the four properties that describe waves?
speed, wavelenth, frequecy and amplitude
Another name for a reflective wave is a copied wave.
False: Another name for a reflective wave is an echo.