Beat Frequency and Temperature Effects
Two sound sources have frequencies of 422 Hz and 424 Hz. When one of the sources is heated, the resulting beat frequency is 6 Hz. Which physical principle best explains the change in frequency, and what is the new frequency of the heated source?
A
Thermal expansion; 416 Hz
B
Doppler effect; 430 Hz
C
Wave diffraction; 426 Hz
D
Thermal expansion; 428 Hz
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