When in air, a waterproof speaker emits sound waves that have a frequency of 1000 Hz....
When in air, a waterproof speaker emits sound waves that have a frequency of 1000 Hz.
Part A
When the speaker is lowered into water, does the frequency of the sound increase, decrease, or remain the same?
A) The frequency increases.
B) The frequency decreases.
C) The frequency remains the same.
Part B
When the speaker is lowered into water, does the wavelength of the sound increase, decrease, or remain the same?
A) The wavelength increases.
B) The wavelength decreases.
C) The wavelength remains the same.
Homework Answers
1)
Frequency is property of source and it doesn’t change with medium.
So, frequency will be constant here.
Answer: C
2)
When speaker is lowered into water, velocity of sound increases.
Since,
velocity = wavelength * frequency
wavelength will also increase
Answer: A
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