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Seseorang yang menghadiri konser rock duduk pada jarak 3,5 m dari sebuah amplifier. jika amplifier mengeluarkan daya 154 Wdan terdistribusi ke semua arah, hitung intensitas bunyi.

seseorang yang menghadiri konser rock duduk pada jarak 3,5 m dari sebuah amplifier. jika amplifier mengeluarkan daya 154 Wdan terdistribusi ke semua arah, hitung intensitas bunyi.

Jawaban soal ini adalah 1 W/m^2

Diketahui:
R= 3,5 m
P= 154 W

Ditanya:
I=…?

Jawab:
Intensitas adalah daya yang memancar tiap satuan luas. Intensitas dirumuskan dengan:
I= P/A
I= P/(4πR^2)
Dimana:
I=intensitas (W/m^2)
A= luas (m^2)
R= jarak (m)

Sehingga:
I=P/(4πR^2)
I=154/(4π.3,5^2)
I= 1 W/m^2

Jadi, intensitas tersebut adalah 1 W/m^2

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