Answer Happy

A sound wave propagates in air at 30°C with frequency 4.40 kHz. It passes through a region where the temperature gradually changes, and then it moves through air at 0°C. (a) What happens to the speed of the wave? The speed decreases because of the decrease in the air's density. O The speed increases because of the decrease in the air's density. O The speed decreases because of the increase in the air's density. O The speed increases because of the increase in the air's density. O The speed remains unchanged. What is the speed of the wave at 0°C? 0.99 x Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s (b) What happens to its frequency? The frequency increases with the decrease in temperature. O The frequency decreases with the decrease in temperature. O The frequency remains unchanged. X What is the frequency of the wave at 0°C? 329.4 x Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. kHz (c) What happens to its wavelength? O The wavelength decreases because the wave crests are further apart. O The wavelength decreases because the wave crests are closer together. The wavelength increases because the wave crests are further apart. O The wavelength remains unchanged. O The wavelength increases because the wave crests are closer together. X What is the wavelength of the wave at 0°C? 106 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m