A piano designer wants to change the pitch of a wire and has the following four

Question

A piano designer wants to change the pitch of a wire and has the following four options:
A. change from an aluminum wire to a steel wire of the same thickness (steel has higher density) B. use a thicker wire of the same material
C. use a longer wire D. increase the tension

In order to lower the frequency of the sound, the designer should _________________ (Choose most correct answer).
In order to increase the frequency of the sound, the designer should _________________ (Choose most correct answer).
A,B,C,D, A or B, A or C, B or D, A or B or C, none of the above
these are possible answers

Explanation / Answer

a)A,B for decrese of f

b)C,D for increse of f

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