Vocab
The distance between a point on one cycle of a wave and the same point on the next cycle.
What is wavelength?
A wave in which the medium vibrates at right angles to the direction of the wave.
What is a transverse wave?
Sound waves oscillate parallel or perpendicular to the direction in which the wave travels.
What is a parallel?
The sound of a car travelling towards someone would seem ________ than normal (higher/Lower) due to the ______________
Higher, doppler effect/shift
What formula do you use to find period if you are given frequency?
T=1/f
The pitch/tone of a sound is related to which component of a sound wave?
What is frequency?
A wave that travels along the surface of a medium.
What is a surface wave?
For waves moving at a constant speed, if wavelength is doubled, what happens to the frequency?
What is frequency is halved?
The areas on a standing wave with no movement are:
Nodes
All waves need a ______________ to travel through.
What is a medium.
The number of complete cycles in a given time.
What is frequency?
The maximum displacement of the medium from its rest position
What is amplitude?
What is the phenomenon which opera signers can use to break wine glasses with their voice?
Resonance
A sound wave can not travel through outer space because of the lack of .
What is matter.
What happens to the speed of a wave when it enters a more dense medium?
it increases
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?
? = wavelength x frequency
What is speed/velocity?
In a standing wave the areas with the most amplitude are called:
antinodes
In our sound lab the objects we used to produce specific frequencies of sound were called:
tuning forks
What is the approximate speed of sound in air? (within 20m/s)
343m/s
Define Doppler effect:
The apparent shift in frequency due to movement between a wave source and an observer
Sound waves are _______ waves.
What is longitudinal?
The more energy a wave has, the greater the ___________.
What is amplitude?
Explain how scientists can use wave properties to measure the movement of distant stars
the measure the doppler shift, and as the speed of light is constant, we can determine the objects movement relative to the earth