19. What happens to the Doppler effect in air (i.e., the shift in frequencyof a sound wave) as the temperature increases? (a) It is greater at highertemperatures, but only in the case of a moving source and a stationaryobserver. (b) It is greater at higher temperatures, but only in the case of amoving observer and a stationary source. (c) It is greater at higher tem-peratures than at lower temperatures. (d) It is less at higher temperaturesthan at lower temperatures. (e) The Doppler effect does not change as thetemperature increases.

This is a problem related to sound waves. Here, the concept of the Doppler effect of a sound is…

Answered: 19. What happens to the Doppler effect…

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