Now consider the case when the two 630-Hz loud speakers are driven out of phase such that one loud speaker creates a pressure of Acos(t) just outside the speaker and the other loud speaker creates a pressure of Asin(t) just outside the other speaker. Starting again with the observer located halfway between two loudspeakers, find the intensity heard by the observer.

answer; /// i believe that the correct answer is (c)

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.