Sound speed in Earth

Through the surface layers of the Earth, sound propagates 13 times faster than through air. The charge exploded 1.7 km from the measuring station during the geological survey. How long does it take between the measuring point's soil vibration and the moment an explosion is heard? Speed of sound in air v2 = 340 m/s.

Correct answer:

t =  4.6154 s

Step-by-step explanation:

v2=340 m/s v1=13 v2=13 340=4420 m/s s=1.7 km m=1.7 1000  m=1700 m  t1=s/v1=1700/4420=1350.3846 s t2=s/v2=1700/340=5 s  t=t2t1=50.3846=4.6154 s



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