When a sound source approaches a stationary observer, the frequency of the sound source:
Becomes louder
Becomes quieter
Appears louder
Appears quieter
What is 20km/h in m/s?
200m/s
20000m/s
5.55m/s
333.3m/s
In the formula f'=\(\frac{v±vo}{v±vs}\)f, v stands for:
The frequency observed by the observer
The speed of the wave from the sound source
What, approximately, is the speed of sound in air
400 m/s
340 m/s
1500 m/s
If an object is moving at the same speed at which sound travels in that medium, it is travelling at:
Mach 1
It is impossible to move this fast
Supersonic
Who was the Doppler Effect named after?
Christian Doppler, the Austrian scientist
Johann Doppler, the German race car driver
Madame Doppler, the French pilot
If a man is standing on the side of the road when an ambulance with its siren on passes him, when the ambulance is moving away from him the frequency of its siren:
Is an object is travelling faster than the speed of sound in that medium, it is travelling at:
It is impossible to travel this fast
Supersonic speeds
300 m/s
When a sound source is stationary, the wavelength between the sound waves it produces are:
The same
All different
Smaller on the right hand side of the object
When the wavelength becomes smaller, the frequency:
Stays the same
Becomes smaller
Becomes larger