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two sound waves have frequencies of 12Hz and 10... - WAEC Physics 2011 Question

two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period
A
0.5s
B
1.0s
C
1.2s
D
2.0s
correct option: a
\(f_1 - f_2 = \frac{1}{T}\)

12 - 10 = \(\frac{1}{2}\)

= 0.5
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