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Goshia [24]
3 years ago
12

Hi..Please answer questions???​

Physics
1 answer:
Nadya [2.5K]3 years ago
3 0

Answer:

A

Explanation:

Becuse its complete number

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a person when asked to speak up,increases her sound level from 30dB to 60dB.The amount of power per unit area increased by? a)30
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d) 1000 times

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\frac{I_2}{I_1} = 10^3

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d) 1000 times

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