You are standing 2.5m directly in front of one of the two loudspeakers. they are 3.0m apart and both are playing a 686hz tone in phase. as you begin to walk directly away from the speaker, at what distances from the speaker do you hear a minimum sound intensity? the room temperature is 20c .
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Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
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You are standing 2.5m directly in front of one of the two loudspeakers. they are 3.0m apart and both...
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