Waves and Sounds

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The Speed of Sound: Echolocation with Bats


Bats use a process called echolocation to determine the position of objects around them. A high-pitched pulse of sound is emitted and the bat listens for the reflected signal to determine distances. Suppose a bat was flying towards a flat wall which is 18 m away. The bat emits a sound wave and hears an echo exactly 0.1 seconds later. (Assume the speed of sound to be 340 m/s).