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Waves Vocab
n/a
74
Physics
11th Grade
05/22/2012

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Term
Wave
Definition
A disturbance that propagates through a medium or space
Term
Disturbance
Definition
changes in position with respect to time
Term
medium
Definition
waves can move over large distances but the medium(rope or water) itself has only a limited movement
Term
Waves
Definition
are not matter, however the wave can travel in matter
-can carry energy from one place to another
Term
Pulse Wave
Definition
a wave that consists of a few disturbances
Term
Periodic Wave or Continous Wave
Definition
the motions are repeated at regular intervals
Term
Simple Harmonic Motion
Definition
motion in which the accelerations proportional to the displacement from an equilibrium position and is directed toward that position
Term
wavelength
Definition
the distance between any two successive identical points on a wave
Term
frequency
Definition
is the number of complete cycles per unit of time
Term
period
Definition
is the time for one complete cycle units
Term
amplitude
Definition
is the maximum displacement of a wave as measured from its equilibrium or undisturbed position
Term
transverse wave
Definition
a wave in which the vibrations are at right angles to the direction of propagation
Term
longitudinal wave
Definition
a wave in which the vibration are parallel to the direction of propagation of the wave
Term
rectlinear propagation
Definition
the propagation of the advancing straight wave is perpendicular to the wave front
Term
circular propagation
Definition
the propagation of the advancing circular wave life along radial lines away from the center of disturbance
Term
incidence
Definition
an approaching wave
Term
reflection
Definition
the return of a wave from the boundary of a medium
Term
angle of incidence
Definition
the angle between the incident ray and the normal drawn to the point of incidence
Term
angle of reflection
Definition
the angle between the reflected ray and the normal drawn to the point of incidence
Term
ray
Definition
a line drawn in the direction perpendicular to the wavefront
Term
wavefront
Definition
the portions of the medium surface in which particles are in the same motion
Term
refraction
Definition
the bending of wave disturbances as it passes obliquely from one medium into another
Term
diffraction
Definition
the spreading of a wave disturbance into a region behind an obstruction
Term
intensity
Definition
the power transferred across a unit area perpendicular to the direction of energy flow
Term
damping
Definition
the reduction in the amplitude of a wave due to the dissipation of wave energy
Term
wave crest
Definition
the top part of a wave
Term
wave through
Definition
the bottom part of a wave
Term
sound
Definition
the series of disturbances in better to which the human ear is sensitive. Also, similar disturbances in matter above and below the normal range of human hearing
Term
audio range
Definition
the audio range of frequencies
Term
ultrasonic
Definition
vibrations in matter above 20,000
Term
infrasonic
Definition
vibrations in matter below 20
Term
sonic spectrum
Definition
the frequency range of sound
Term
superposition
Definition
combining the displacements of two or more vectorially to produce a resultant displacement
Term
standing wave
Definition
the resultant of two wave trains of the same wavelength, frequency and amplitude
Term
interference
Definition
refers to what happens when tow waves pass through the same region of space at the same time
Term
constructive interference
Definition
when two standing waves approach each other on the same side of the equilibrium line
Term
destructive interference
Definition
when two standing waves approach each other on the opposite side of the equilibrium line
Term
beat
Definition
the interference effect resulting from the superposition of two waves of slightly different frequencies
Term
node
Definition
a point of no disturbance in a standing wave
Term
loop
Definition
a midpoint of a vibrating segment of a standing wave
Term
resonance
Definition
the inducing of vibrations of a natural rate by a vibrating source
Term
fundamental
Definition
the lowest frequency of sound produced by an instrument
Term
harmonics
Definition
the fundamental and the tones frequencies are whole number multiples of the fundamentals
Term
rarefaction
Definition
the region of a longitudinal wave in the vibrating particles are farther apart than their equilibrium distance
Term
compression
Definition
the region of a longitudinal wave in which the distance separating the vibrating particles is less than their equilibrium distance
Term
refraction
Definition
the bending of a wave disturbance as it passes obliquely from one medium into another, in which the disturbance has a different velocity
Term
angle of refraction
Definition
the angle between the refracted ray and the normal drawn to the point of refraction
Term
pitch
Definition
is the characteristic of sound that depends on the frequency that the EATR recieves
Term
loudness
Definition
the sensation that depends principally on the intensity of sound waves reaching the ear
Term
quality
Definition
the property of sounds waves that depends on the number of harmonics and the prominence
Term
law of reflection
Definition
when a wave disturbance is reflected at the boundary of a transmitted medium, the angle of indigence is equal to the angle of reflection
Term
doppler effect
Definition
the change observed in the frequency with which a wave from a given source reaches an observer when eh source and the observer are in relative motion
Term
production of sound
Definition
compression waves propagate as longitudinal distances
Term
production of sound
Definition
the disturbances consist of compression and rarefaction
Term
production of sound
Definition
these disturbances give rise to elastic forces
Term
production of sound
Definition
the particles of the medium acquire energy from the vibrating source
Term
production of sound
Definition
the wave energy is passed along to adjacent particles
Term
thermodynamics
Definition
the study of quantitative relationships between heat ad over forms of energy
Term
system
Definition
is that part of the entire universe which we have selected for consideration
Term
surrounding
Definition
everything else in the universe
Term
state function
Definition
variables used to define the conditions of the system
Term
open system
Definition
mass may enter or leave
Term
closed system
Definition
no mass may enter or leave
Term
isolated system
Definition
if no energy passes across the boundaries
Term
nonisolated system
Definition
if energy does pass across the boundaries
exothermic, endothermic
Term
exothermic
Definition
energy flows out of the system
Term
endothermic
Definition
energy flows into the system
Term
internal energy
Definition
is the total potential and kinetic energy of the particles of a substance
Term
enthalpy
Definition
the internal energy and any energy due to the expansion possibilities of the system
Term
entropy
Definition
the property that describes the disorder of a system
Term
zeroth law of thermodynamics
Definition
two systems individually in thermal equilibrium with a third system are in thermal equilibrium
Term
first law of thermodynamics
Definition
the quantity of energy supplied to any system in the form of
Q= W+ CHANGE IN E
Term
Second law of thermodynamics
Definition
heat flows naturally from a hot object to a cold object
Term
third law of thermodynamics
Definition
it is not possible to lower the temp of any system to absolute zero
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