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Semitones and Notes from a String

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If a string of length 10cm plays a note G when plucked, by how much, to the nearest centimeter, must the string be shortened to play the note B, four semitones above this G? Chose the one correct option.


A. 6cm B. 11cm C. 16cm D. 21cm E. 25cm F. 30cm G. 33cm H. 50cm

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Solution Summary

The shortening of a string is calculated to produce a given note. The semitones and notes from a string are examined.

Solution Preview

Because frequency is inversely proportional to length,
four semitones = three ...

Solution provided by:
  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
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