Two loudspeakers L, and L2 driven from a common oscillator are arranged as shown in the diagram. A detector is placed at D. It is found that, as the frequency of the oscillator
is gradually changed from 200 Hz to 1000 Hz the detected signal passes through a series
of maxima and minima.

(a) Explain why this is so.
(b) Calculate the frequency at which the first
minimum above 200 Hz is observed.
D
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b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

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.