Oscillations & Periodic Motion
A tennis ball going back and forth is an example of:
simple harmonic motion
This term describes the rise in pitch as an alarm approaches, then falls as it moves away.
What is the Doppler Effect?
The property that can be defined as P/A
What is Intensity
The lowest point in a wavelength.
What is the Trough
The period equation
What is T=2(pi) square root m/k
As a sound approaches an observer, the waves are compressed, causing this to increase.
What is frequency(or pitch)?
The property in a sound wave that determines intensity
What is amplitude
A point on a longitudinal wave with no amplitude
What is a node
If period increases, what happens to frequency?
It decreases
For the Doppler Effect to occur, this must exist between the source of the waves and the observer.
What is Relative Motion?
The intensity of a sound at a distance r from a point source of power P
What is P/4πr2
The missing ingredient in this formula:
1Hz=1 cycle per ____
What is a second
The spring constant is increased by a factor of 4. If the mass is unchanged, how does the period of the oscillation change?
it increases speed by 4x
Fsource/(1+- Vsource/Vsound)
What is F observer (or frequency observer)?
When loudness doubles, sound intensity increases by this factor
What is a factor of 10
A type of wave that only occurs in periods of multiples of 1/2
What is a standing wave
How much force is being applied to a spring at equilibrium?
None
If a car's horn is 500Hz, and the car moves away from you, the observed frequency will be.
What is less than 500Hz?
Doubling the loudness of a sound corresponds to an increase of this many decibels
What is 10dB
When two crests meet on 2 separate waves
What is constructive interference