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Frekuensi nada dasar suatu pipa organa terbuka sama dengan frekuensi resonansi kelima suatu pipa organa tertutup. Jika panjang pipa organa terbuka 0 , 8 m , hitung panjang pipa organa tertutup! Perhatian : frekuensi resonansi kelima tak sama dengan frekuensi harmonik kelima.

Frekuensi nada dasar suatu pipa organa terbuka sama dengan frekuensi resonansi kelima suatu pipa organa tertutup. Jika panjang pipa organa terbuka , hitung panjang pipa organa tertutup!

Perhatian: frekuensi resonansi kelima tak sama dengan frekuensi harmonik kelima.

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A. Acfreelance

Master Teacher

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panjang pipa organa tertutup adalah 4,4 m.

 panjang pipa organa tertutup adalah 4,4 m.

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Diketahui : pipa organa terbuka = pipa organa tertutup ( yang berarti cepat rambat udara di kedua pipa adalahsama ) pipa organa terbuka = Ditanya : pipa organa tertutup = .... ? Penyelesaian : Pada pipa organa tertutup, perlu diperhatikan hal berikut ini : Sehingga, jelas bahwa terdapat perbedaan antara frekuensi harmoni ke 5 dengan frekuensi resonansi ke 5. Maka : Jadi,panjang pipa organa tertutup adalah 4,4 m.

Diketahui :
begin mathsize 14px style f subscript 0 end style pipa organa terbuka = begin mathsize 14px style f subscript 5 end style pipa organa tertutup
(yang berarti cepat rambat udara di kedua pipa adalah sama)
begin mathsize 14px style L end style pipa organa terbuka = begin mathsize 14px style 0 comma 8 space straight m end style

Ditanya :
undefined pipa organa tertutup = .... ?

Penyelesaian :
Pada pipa organa tertutup, perlu diperhatikan hal berikut ini :

begin mathsize 14px style Harmoni space 1 space rightwards arrow f subscript 0 Harmoni space 2 space rightwards arrow f subscript 3 Harmoni space 3 space rightwards arrow f subscript 5 Harmoni space 4 space rightwards arrow f subscript 7 Harmoni space 5 space rightwards arrow f subscript 9 end style

Sehingga, jelas bahwa terdapat perbedaan antara frekuensi harmoni ke 5 dengan frekuensi resonansi ke 5. Maka :

begin mathsize 14px style f subscript 0 space pipa space organa space terbuka equals f subscript 5 space pipa space organa space tertutup thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space fraction numerator n plus 1 over denominator 2 L subscript t e r b u k a end subscript end fraction v equals fraction numerator 2 n plus 1 over denominator 4 L subscript t e r t u t u p end subscript end fraction v thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space fraction numerator 0 plus 1 over denominator 2 L subscript t e r b u k a end subscript end fraction up diagonal strike v equals fraction numerator open parentheses 2 cross times 5 close parentheses plus 1 over denominator 4 L subscript t e r t u t u p end subscript end fraction up diagonal strike v thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space fraction numerator 1 over denominator 2 L subscript t e r b u k a end subscript end fraction equals fraction numerator 11 over denominator 4 L subscript t e r t u t u p end subscript end fraction thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space 1 cross times 4 L subscript t e r t u t u p end subscript equals 11 cross times 2 L subscript t e r b u k a end subscript thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space 4 L subscript t e r t u t u p end subscript equals 22 L subscript t e r b u k a end subscript thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space L subscript t e r t u t u p end subscript equals fraction numerator 22 L subscript t e r b u k a end subscript over denominator 4 end fraction thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space L subscript t e r t u t u p end subscript equals fraction numerator 22 cross times 0 comma 8 space straight m over denominator 4 end fraction thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space L subscript t e r t u t u p end subscript equals fraction numerator 17 comma 6 space straight m space over denominator 4 end fraction thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space thin space L subscript t e r t u t u p end subscript equals space 4 comma 4 space straight m end style


Jadi, panjang pipa organa tertutup adalah 4,4 m.

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