A siren creates a sound level of \( 60 \mathrm{~dB} \) at a location \( 500 \mathrm{~m} \) from ...

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A siren creates a sound level of \( 60 \mathrm{~dB} \) at a location \( 500 \mathrm{~m} \) from the speaker. The siren is powered by a battery that delivers a total energy of \( 1.0 \mathrm{~kJ} \). Assuming that the efficiency of siren
\( P \) is \( 30 \% \), determine the total time the siren can sound.

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