Physics CH 7: Waves and Sound

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What type of waves have oscillations of wave particles perpendicular to the direction of wave propagation ex.)The "Wave" at a sports event or electromagnetic waves
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Terms in this set (40)
What type of waves have oscillations of wave particles perpendicular to the direction of wave propagation ex.)The "Wave" at a sports event or electromagnetic waves
Transverse
What type of waves have oscillations of wave particles parallel to the direction of wave propagation ex.)sound waves
Longitudinal
"x" in a wave refers to how far a point is from the equilibrium position, expressed as a vector quantity. What is "x"?
displacement
The frequency of a wave is the number of ?
cycles per second
The units for frequency are ?
Hz (hertz)
Another way of expressing frequency which is commonly used in cases of simple harmonic motion (springs and pendula), is ?
angular frequency
Angular frequency is expressed in?
radians per second
The number of seconds it takes to complete a cycle is known as?
period
The inverse of frequency of a wave is its?
Period
Period is abbreviated as?
T
What describes the ways in which waves interact in space to form a resultant wave?interferenceWhen waves are exactly in phase with each other and the amplitude of the resultant wave is equal to the sum of the amplitudes of the 2 interfering waves, this is called?Constructive interferenceWhen waves are exactly out of phase with eachother, this is known as?Destructive InterferenceDuring destructive interference, the amplitude of the resultant wave is equal to ?The difference in amplitude between the two interfering wavesWhen two waves are not quite perfectly in or out of phase with eachother, the displacement of the resultant wave is equal to?The sum of the displacements of the two interfering wavesWhen two waves are not quite perfectly in or out of phase with eachother, this is called?partially constructive/destructive interferenceWhat type of waves have continuously shifting points of maximum and minimum displacement?traveling waves? are produced by the constructive and destructive interference of two waves of the same frequency traveling in opposite directions in the same spacestanding waveA point of maximum oscillation is also known as an?antinodeA point where there is no oscillation is also known as a ?nodeWhat is known as the increase in amplitude that occurs when a periodic force is applied at the natural (resonant) frequency of an object?resonance? is a decrease in amplitude cause by an applied or nonconservative forceDamping? is produced by mechanical disturbance of a material that creates an oscillation of molecules in the material?soundSound propagates through all forms of matter but not in a ?vaccumSound propagates fastest through?solidsSound propogates faster through solid or gas?solidWithin a medium, as density increases, speed of sound?decreasesThe pitch of a sound is related to its?frequencyWhat is known as a shift in the perceived frequency of a sound compared to the actual frequency of the emitted sound when the source of the sound and its detector are moving relative to one another?doppler effectThe apparent frequency will be higher than the emitted frequency when the source and detector are moving in which direction in relation to each other?toward each otherThe apparent frequency will be lower than the emitted frequency when the source and detector are moving in which direction in relation to each other?away from eachotherThe apparent frequency can be higher, lower or equal to the emitted frequency when two objects are moving in which direction in relation to eachother?When the two objects are moving in the same direction, depending on their relative speedsWhen the source is moving at or above the speed of sound, ? can formshock waves (sonic booms)Loudness or volume of sound (sound level) is related to its ?intensityIntensity is related to a wave's?amplitudeIntensity decreases over distance and some energy is lost to ? from frictional forcesattenuation (damping)Strings and ? support standing wavesopen pipesThe length of the string or open pipe is equal to?some multiple of half-wavelengthsClosed pipes also support standing waves and the length of the pipe is equal to ?some odd number of quarter wavelengthsWhat type of sound is used medically for both diagnostic and therapeutic purposes?ultrasound