a hiker shouts toward a vertical cliff 465m away. The echo is heard 2.7s later. a. What is the speed of sound of the hikers voice in air?

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a hiker shouts toward a vertical cliff 465m away. The echo is heard 2.7s later.a. What is the speed of sound of the hikers voice in air?b. The wavelength of the sound is 0.750m. What is it’s frequency?c. What is the period of the wave?