Question

What is the wavelength of a sound wave with a frequency of 18.9 kHz in air at 0.00°C?

a) 1.8 meters
b) 1.59 meters
c) 0.018 meters
d) 0.0159 meters

Answer 1

c) 0.018 meters The wavelength of a sound wave with a frequency of 18.9 kHz in air at 0.00°C is approximately 0.018 meters.

Step-by-step explanation:

To find the wavelength of a sound wave, we can use the formula:

wavelength = speed of sound / frequency

Given that the frequency is 18.9 kHz (18,900 Hz), and the speed of sound in air at 0.00°C is approximately 343 m/s, we can substitute these values into the formula to find the wavelength:

wavelength = 343 m/s / 18,900 Hz

Calculating this gives us a wavelength of approximately 0.0181 meters. Therefore, the correct answer is option c) 0.018 meters.