As people sing in church the sound level everywhere inside, Physics

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As people sing in church the sound level everywhere inside

As people sing in church, the sound level everywhere inside is 107 dB. No sound is transmitted through the massive walls, but all the windows and doors are open on a summer morning. Their total area is 23.0 m2. (a) How much sound energy is radiated in 18.0 min? J (b) Suppose the ground is a good reflector and sound radiates uniformly in all horizontal and upward directions. Find the sound level 1.8 km away. dB

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Physics: As people sing in church the sound level everywhere inside

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