Two small speakers A and B are driven in step at 720 Hz by the same audio oscillator. These speakers both start out 4.50 m from the listener, but speaker A is slowly moved away At what distance dd will the sound from the speakers first produce destructive interference at the location of the listener? If A keeps moving, at what distance dd will the speakers next produce destructive interference at the listener? After A starts moving away, at what distance will the speakers first produce constructive interference at the listener?

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.