7. A helicopter flies directly toward a vertical cliff. When the helicopter is 0.70km from the cliff face, it transmits

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7 A Helicopter Flies Directly Toward A Vertical Cliff When The Helicopter Is 0 70km From The Cliff Face It Transmits 1 (12.38 KiB) Viewed 40 times

7. A helicopter flies directly toward a vertical cliff. When the helicopter is 0.70km from the cliff face, it transmits a sonar signal. It receives the reflected signal 3.4s later. If the signal propagates at 3.5x10² ms, the helicopter is moving at.... a) approximately 31 ms c) approximately 62 ms b) approximately 45 ms 1 d) not enough information to answer