Catch some waves
A disturbance in matter that transfers energy through the matter.
What is a mechanical wave?
A wave in which the vibration of the medium is parallel to the direction the wave travels.
What is a longitudinal wave?
When air vibrates back and forth.
What is oscillate?
An indication of how high or low a sound is, which is primarily determined by the frequency of the sound wave.
What is pitch?
This forms mechanical waves.
What is when a source of energy causes a vibration to travel through a medium?
Highest points on the wave.
What are crests?
A wave that travels a long the surface of a medium.
What is a surface wave?
Any speed faster than the speed of sound in the medium of interest.
What is supersonic speed?
Finish the statement: Sound waves with high pitch have __________frequency.
True or false: A flute has a higher pitch than a piccolo.
What is false?
Lowest points on the wave.
What are troughs?
* The unit of frequency.
What is the hertz?
The rate at which a wave's energy flows through a given area.
What is intensity?
A change in sound frequency caused by the motion of the sound source, motion of the listener, or both.
Fill in the blank: Ultrasonic waves have higher frequencies and thus ________ wavelengths.
What is shorter/smaller?
A wave in which the medium vibrates at right angles to the direction the wave travels.
What is a transverse wave?
Finish this statement: The more energy a wave has, the greater its ____________.
What is amplitude?
The units that measure sound intensity.
What are decibels?
Name a use or application for reflected sound waves.
What is sonar? - volcanoes, fishing, bat's
What is ultrasound? medicine, pregnancy
A power saw has an intensity of 110 db. A normal conversation has 40 db. How many times larger is the sound intensity of the power saw?
What is 7?
The distance between the waves.
What is the wavelength?
The formula for wave speed.
What is wavelength times frequency?
* These Navy jets have a maximum speed of Mach 1.8.
What are the Blue Angels?
Longitudinal waves with frequencies between 20HZ and 20000HZ.
What are sonic waves?
Experiment 9.4***
In our experiment, when the bottle was empty, was the pitch higher or lower?