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2 strings both vibrate at exactly 220 Hz. The tension in one of them is then decreased sightly. As a result, 3 beats per second are heard when both strings vibrate. What is the new frequency. A. 217 Hz B. 220 Hz

C. 223 Hz
D. 440 Hz

User Basicxman
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1 Answer

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Step-by-step explanation:

Given that,

2 strings both vibrate at exactly 220 Hz. The frequency of sound wave depends on the tension in the strings.

The tension in one of them is then decreased sightly, then
f_2 will decrese.

Beat frequency,
f=f_1-f_2


3=220-f_2


f_2=217\ Hz

So, the new frequency of the string is 217 Hz. Hence, this is the required solution.

User Jamie Howarth
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