Answer: (i) army : Echoes are used by military discover the newest gun status away from adversary

Answer: (i) army : Echoes are used by military discover the newest gun status away from adversary If the speed out-of sound try 334 ms-step 1, estimate amount of time in that he hears a mirror army, geologists, fishermen. Answer: t = 0 Radar a tool can be used to find an adversary sky-interest boat. …

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