Waves and Energy Transfer
What do waves transfer?
Energy
What is a period?
Time for one wave to occur
What is the doppler effect?
When a wave source and observer are moving.
The frequency is different than the source.
every object has it's own particular frequency
What is superposition?
Is mass transferring?
No
What is frequency?
Number of waves over time
A source of waves and an observer are moving relative to each other. The observer will detect a steadily increasing frequency if ...
he accelerates towards the source
What is resonance?
the vibration of a source matches an objects natural frequency
What is the principle of superposition?
The sum or difference of the amplitude of multiple waves
What does a source do?
Create energy and create the wave
What is amplitude?
Maximum displacement from midpoint
A student sees a train that is moving away from her and sounding its whistle at a constant frequency. Compared to the sound produced by the whistle, the sound obsered by the student is ...
lower in pitch
Whats an example of resonance?
Singer shattering a glass and/or the Tacoma Bridge collapse
What is interference?
The effect of super position (what you see after waves cross)
What determines the frequency of a wave?
The source
The energy of a sound wave is most closely related to it's ...
Doppler effect is observed in which types of waves?
Longitudinal and transverse waves
How does a microwave relate to resonance?
a microwave produces waves at the same frequency that water vibrates
What is constructive interference?
Amplitudes of 2 waves are on the same side of the midpoint (they add)
What's a wave?
A vibration that travels through something
What are the three ways to measure a wavelength of 1 wave?
1) crest to crest
2) trough to trough
3) 3 midpoints in a row
Doppler shift in frequency is independent of ...
the distance from the source to the listener
How does a microwave heat up you food?
water molecules vibrate which produce heat due to friction which leads to your food being heat up
What is destructive interference?
Amplitudes of 2 waves are on opposite sides of the midpoint (they subtract)