Waves
Definitions
Equations
Sound
Wavelength
100
Sound waves human ears generally detect
What is ...... Sonic Waves
between 20 Hz and 20,000 Hz
100
An indication of how high or low a sound is, which is primarily determined by the frequency of the sound wave.
What is...... Pitch
100
The equation used for wave speed.
What is..... v = 
x f
100
The speed of sound.
What is ...... Mach 1 (760 mph)
100
The distance between a point on one cycle of a wave and the same point on the next cycle.
What is ....... Wavelength
200
Waves with frequencies less than 20 Hz.
What is...... Infrasonic Waves
200
The number of complete cycles in a given time.
What is..... frequency
200
Lambda = _________________ and unit used is _____________
What is..... Wavelength and meters
200
Affects the speed of sound.
What is.... temperature
Because the warmer a medium is, the faster its atoms/molecules move around or vibrate. This allows the sound energy to move faster through the medium.
200
Inversely proportional to one another.
What is...... Wavelength and Frequency
300
Waves with frequencies higher than 20,000 Hz.
What is...... Ultrasonic Waves
300
The time it takes to complete one full cycle.
What is...... period.
300
f = ________________ and unit used is ___________________
What is.... frequency and hertz/Hz/1/s
300
The rate at which a wave's energy flows through a given area. It's a way of expressing wave amplitude.
What is.... Sound Intensity
300
True or False
Ultra sonic waves have higher frequencies than sonic waves. This means they have shorter wavelengths.
What is..... True
400
A soundwave hits an obstruction, part of the wave is reflected, and part is transmitted.
What is......Ultrasound
400
Any motion that repeats at regular time intervals.
What is ...... Periodic Motion.
400
v = ________________and unit used is ___________________.
What is..... speed and meter/second
400
Two components sound intensity depends on.
What is.... wave amplitude and how far you are from the sound source.
400
One end of a rope is vibrated to produce a wave with a wavelength of 1.2 meters. The frequency of the wave is 3.3 hertz. What is the speed of the wave in m/s?
What is...... 3.96 m/s
v = 1.2 m x 3.3 1/s = 3.96 m/s
500
A type of sound navigation in which emitted ultrasonic waves are reflected back and used to determine the location and shapes of objects in the waves' path.
What is...... Sonar
500
The maximum displacement of the medium from its rest position.
What is...... amplitude of a wave
500
Equation used for speed of sound in air.
What is.... (331.5 + 0.6 x T) m/s
500
The unit sound intensity is measured in.
What is .... decibels (dB)
500
What is the frequency of a wave that travels at a speed of 3.0 m/s and has a wavelength of 0.5 meters?
What is...... 6.0 Hz
f = 3.0 m/s ____________ = 6.0 1/s = 6.0 Hz
0.5 m