A jet plane emits 3.0*10^5 J of sound energy per second. a)What is the sound level 21m away

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A jet plane emits 3.0*10^5 J of sound energy per second.

a)What is the sound level 21m away

I have attached pictures of Partb and Partc 

Air absorbs sound at a rate of about 7.0 dB/km; calculate what the sound level will be 4.00 km.
Express your answer using two significant figures.
B =
ΑΣΦ
I ?
dB
Transcribed Image Text:Air absorbs sound at a rate of about 7.0 dB/km; calculate what the sound level will be 4.00 km. Express your answer using two significant figures. B = ΑΣΦ I ? dB
Calculate what the sound level will be 9.50 km away from this jet plane, taking into account air absorption.
Express your answer using two significant figures.
B =
ΑΣΦ
?
dB
Transcribed Image Text:Calculate what the sound level will be 9.50 km away from this jet plane, taking into account air absorption. Express your answer using two significant figures. B = ΑΣΦ ? dB
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