4. (5 Mars Two loads are placed on the The loudspeakers emit 686 le sound waves in-phase point ours. A listener is sitti

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4 5 Mars Two Loads Are Placed On The The Loudspeakers Emit 686 Le Sound Waves In Phase Point Ours A Listener Is Sitti 1 (21 KiB) Viewed 23 times

4. (5 Mars Two loads are placed on the The loudspeakers emit 686 le sound waves in-phase point ours. A listener is sitting on the axis 10 meters away from the speakers. What is the smallest distance between the speakers if the interference of the sound waves at the listener's location is always completely destructive! Take the speed of sound to be 343 m/s 5. (10 Marks) A plastic ball of radius 75 cm and density 840 k/ mis attached to an 0.5 m string whose other end is fixed to the bottom of a a large container. The container is filled with seawater so that the ball and string are completely submerged and the string is taut. (a) What is the tension in the string? (b) If you removed the ball and its string from the water and horizontally spun the ball on the end of its string in a circle, what period would produce 100 times the tension in the string as you found in (a)?