coolkitty35
21.08.2019 •
Physics
Aloudspeaker is placed between two observers who are 125 apart, alonq the line connecting them. if one observer (observer a) records a sound level of 55 db and the other (observer b) records a sound level of 85 db, how far is the speaker from each observer? m (from observer a) m (from observer b)
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Ответ:
Explanation:
55dB = 5.5 B
85 dB = 8.5 B
For observer A intensity of sound I(A) = 10⁵°⁵ unit
For observer B intensity of sound I(B) = 10⁸°⁵.unit
If distance be d₁ for A and d₂ for B
d₁ ²/ d₂² = 10⁸⁰⁵/10⁵°⁵
= 10³
d₁/d₂ = 31.62 , d₁ + d₂ = 125 m
d₁ =( 125/32.62) x 31.62 =121.17 m
d₂ = 3.83 m
Ответ: