Answer: (i) army : Echoes can be used of the army to locate the fresh gun updates off enemy

Answer: (i) army : Echoes can be used of the army to locate the fresh gun updates off enemy Whether your rates of sound try 334 ms-step one, calculate time in that he hears a mirror military, geologists, anglers. Answer: t = 0 Radar an instrument can be used to find a challenger air-pastime boat. …

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