A tuning fork vibrates at a frequency of 440 Hz. When it and another tuning fork vibrate together, a beat frequency of 2 Hz is produced. (a) What are the possible frequencies at which the second fork is vibrating? (b) Will a small piece of wax added to one of the prongs of the second fork cause its frequency to increase or decrease? Explaim (c) When the wax is added and both forks are sounded, the beat frequency decreases. Which of the frequen cies in part (a) was the actual frequency of vibration of the second tuning fork? Explain. 3

A tuning fork vibrates at a frequency of 440 Hz. When it and another tuning fork vibrate together, a beat frequency of 2 Hz is produced. (a) What are the possible frequencies at which the second fork is vibrating? (b) Will a small piece of wax added to one of the prongs of the second fork cause its frequency to increase or decrease? Explaim (c) When the wax is added and both forks are sounded, the beat frequency decreases. Which of the frequen cies in part (a) was the actual frequency of vibration of the second tuning fork? Explain. 3