Beats and the Doppler Effect (HSC SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Two instruments play at Hz and Hz. What beat frequency is heard?
Two instruments play at Hz and Hz. What beat frequency is heard?
Hz
What causes beats when two sounds of slightly different frequencies combine?
What causes beats when two sounds of slightly different frequencies combine?
Alternating constructive & destructive
What is the maximum frequency difference for beats to be audible?
What is the maximum frequency difference for beats to be audible?
Approximately Hz
How do musicians use beats to tune instruments?
How do musicians use beats to tune instruments?
Beat frequency decreases until it stops
What is the Doppler effect?
What is the Doppler effect?
Change in frequency due to relative motion
What happens to observed frequency when a sound source approaches an observer?
What happens to observed frequency when a sound source approaches an observer?
Frequency increases (higher pitch)
What happens to wavelength when a sound source moves away from an observer?
What happens to wavelength when a sound source moves away from an observer?
Wavelength increases
What is the speed of sound in air at room temperature?
What is the speed of sound in air at room temperature?
m·s
A Hz siren approaches at m·s. Observer is stationary. Find observed frequency.
A Hz siren approaches at m·s. Observer is stationary. Find observed frequency.
Hz
What determines if observed frequency is higher or lower in the Doppler effect?
What determines if observed frequency is higher or lower in the Doppler effect?
Whether distance is decreasing/increasing