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ololo11 [35]
4 years ago
6

HURRY!!

Physics
2 answers:
JulijaS [17]4 years ago
8 0

Electrons move. I got you

QveST [7]4 years ago
5 0

Its C just checked on edg

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If a sound is 30 dB and its absolute pressure was 66 x 10-9 Pa, what must have been the reference pressure?
Ksenya-84 [330]

Given:

I = 30dB

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Solution:

Formula used:

I = 20\log_{10}(\frac{P}{P_{o}})           (1)

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P = absolute pressure

P_{o} = reference pressure

Using Eqn (1), we get:

30 = 20\log _{10}\frac{66\times 10^{-9}}{P^{o}}

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P_{o} = 2.08 × 10^{-9} Pa

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