Question

suppose that recording station N located 200 km north of the epicenter of an earthquake, and recording station S is located 100 on south of the epicenter of the same earthquake. Which of the following statements would be true

Answer 1

Answer:

c.The value of T at Recording Station N would be greater than T at Recording Station S.

Explanation:

We can deduce from the information provided that the value of T at recording station N would be greater than T at recording station S.

This problem relates distance with time.

       Speed  = $\frac{disance}{time}$

                  Distance  = Speed x time

• Just like any other physical quantity, speed of a substance is directly related to time.
• The larger the time taken the farther the distance it will cover assuming the velocity is constant.
• Earthquake waves for example moves at constant speed with a unique velocity in earth materials.
• The farther the distance, the more time it will take to reach the seismic recording station.
• Since N is a distance of 200km from the epicenter, it will take a greater time and have a higher reading of T to reach the station.

Answer 2

Answer: C 

Explanation: The value of Δt is used as an indicator of distance from the epicenter of an earthquake. The further a location is from the epicenter, the larger the value of Δt. Since Recording Station N is further from the epicenter than Recording Station S is, N has a larger Δt than S.