1.

When two tuning forks A and B are sounded together, the number of beats heard is ν. The frequency of fork A is f. If the prong of fork B is loaded with a little wax, the number of beats decreases. The initial frequency of fork B is

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When two tuning forks A and B are sounded together, the number of beats heard is ν. The frequency of fork A is f. If the prong of fork B is loaded with a little wax, the number of beats decreases. The initial frequency of fork B is



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