Physics, 16.03.2020 23:53, munchyswish

Sound with frequency 1220 Hz leaves a room through a doorway with a width of 1.06 m . At what minimum angle relative to the centerline perpendicular to the doorway will someone outside the room hear no sound

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Sound with frequency 1220 Hz leaves a room through a doorway with a width of 1.06 m . At what minimu...