Geologists use explosives to map the subterranean. The times for the reflected waves to arrive at a monitoring station can tell a great deal about the composition of the rock structures. Suppose the time it takes for a wave that is reflected from the interface of 1) and 2) is 2 s, and the time for another wave that is reflected between 2) and 3) is 2.5 s, and the speed of the wave in layer 1) is 6 km/s and in layer 2) is 4 km/s, then how thick is layer 2)?
A) 2 km
B) 1 km
C) 3 km
D) 6 km
E) 8 km

Question

Geologists use explosives to map the subterranean. The times for the reflected waves to arrive at a monitoring station can tell a great deal about the composition of the rock structures. Suppose the time it takes for a wave that is reflected from the interface of 1) and 2) is 2 s, and the time for another wave that is reflected between 2) and 3) is 2.5 s, and the speed of the wave in layer 1) is 6 km/s and in layer 2) is 4 km/s, then how thick is layer 2)? 
A) 2 km 
B) 1 km 
C) 3 km 
D) 6 km 
E) 8 km

Quizplus · Accepted Answer

The Answer of Geologists use explosives to map the subterranean. The times for the reflected waves to arrive at a monitoring station can tell a great deal about the composition of the rock structures. Suppose the time it takes for a wave that is reflected from the interface of 1) and 2) is 2 s, and the time for another wave that is reflected between 2) and 3) is 2.5 s, and the speed of the wave in layer 1) is 6 km/s and in layer 2) is 4 km/s, then how thick is layer 2)? 
A) 2 km 
B) 1 km 
C) 3 km 
D) 6 km 
E) 8 km

Geologists Use Explosives to Map the Subterranean