Which combination of frequencies would produce the lowest beat frequency? (1 point)

O 10 Hz and 15 Hz
10 Hz and 20 Hz
500 Hz and 600 Hz
O 500 Hz and 501 Hz

3 answers

500 Hz and 501 Hz.
A sound has a higher pitch than a bell. Which quantity must also be higher in this sound than in the bell? (1 point)
O frequency
wavelength
amplitude
speed
Frequency.