Earthquake produce several types of shock waves. The most known are the P-waves and the s-waves. In the earth's crust, the P -waves travel at around 6 km / s , while in the S -waves at about 3 km

Question

Earthquake produce several types of shock waves. The most known are the P-waves and the s-waves. In the earth's crust, the P -waves travel at around $6 km / s$ , while in the S -waves at about $3 km / s$ . The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 50 s and distance where earthquake occur from the seismic station in 100 xkm , the find x .

Answer:

3.00

Solution:

$\frac{100 x}{v _{1}} - \frac{100 x}{v _{2}} = 50$ $\Rightarrow 100 x = 50 \times \frac{V _{1} V _{2}}{v _{2} - v _{1}}$

$100 x = 50 \times 6 = 300 x = 3$

TestHub · Accepted Answer

v 1 ​ 100 x ​ − v 2 ​ 100 x ​ = 50 ⇒ 100 x = 50 × v 2 ​ − v 1 ​ V 1 ​ V 2 ​ ​ ​ 100 x = 50 × 6 = 300 ​ x = 3 ​

Physics - Kinematics Question with Solution | TestHub

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