The wave length of sound in air is 5cm. Its frequency is (Take velocity ofsound=330m/s)A. 6.6x107cycles per secondB. 660 cycles per secondC. 6.6mega cycles per secondD. 6x109 cycles per secondE. 6.6kilo cycles per second
Question
The wave length of sound in air is 5cm. Its frequency is (Take velocity ofsound=330m/s)A. 6.6x107cycles per secondB. 660 cycles per secondC. 6.6mega cycles per secondD. 6x109 cycles per secondE. 6.6kilo cycles per second
Solution
To find the frequency of the sound wave, we can use the formula:
frequency = velocity / wavelength
Given that the velocity of sound in air is 330 m/s and the wavelength is 5 cm, we need to convert the wavelength to meters:
wavelength = 5 cm = 5/100 m = 0.05 m
Now we can substitute the values into the formula:
frequency = 330 m/s / 0.05 m = 6600 cycles per second
Therefore, the correct answer is B. 660 cycles per second.
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