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10.You throw a ball vertically upward from the roof of a tall building. The ball leaves your hand at a point even with the roof railing with an upward speed of 15.0 m/s; the ball is then in free fall. On its way back, it just misses the railing. Find (a) the ball’s position and velocity 1.00s and 4.0s after leaving your hand; (b) the ball’s velocity when it is 5.00 m above the railing; (c) the maximum height reached; (d) the ball’s acceleration when it is at its maximum height
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Your sound system consists of two speakers 2.50 m apart as shown in Figure. You sit 2.50 m from one of that speakers so that the two speakers are at the corners of a right triangle. As a test, you have both speakers emit the same pure tone (sinusoidal sine wave). The speakers emit in phase. At your location, what is the lowest frequency that you will get
(i) destruction interference
(ii) constructive interference?
[Given the speed of sound in air = 343 m/s]
[6]
(b) A guitar string produces 4 beats/s when sounded with a 250 Hz tuning fork. What are the 2 possible
frequency of the string?