A herdsman yelling out to fellow herdsman heard his voice reflected by a cliff 4s later. What is the velocity of sound in air if the cliff is 680m away? A. 170m/s B. 136m/s C. 340m/s D. 680m/s E. 510m/s
ANSWER: Option C
EXPLANATION: Apply the formula below;
V = 2d/t
Why 2d? Because for an observer to hear an echo, it means the sound travels a distance, hits an obstacle and then reflects back the same distance from the observer! Meaning, it travels twice the distance between the observer and the obstacle!
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His Name is Tiamiyu Abdulbazeet Olawale. He is a student at the University of Ilorin studying Electrical and Electronics Engineering. He likes to give the latest updates about Nigeria and international institutions as he aims at helping people to lay their hands on the right information.