# math

Earthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the earth's crust, the P-waves travel at around 6.5 km/s while the S-waves move at about 3.5 km/s. The actual speeds vary depending on the type of material they are going through. 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 33s, how far from the seismic station did the earthquake occur?

No one has answered this question yet.

1. 👍 0
2. 👎 0
3. 👁 406
1. distance = speed * time
d = 6.5 t
d = 3.5 (t+33)

6.5 t = 3.5 t + 115.5
t = 38.5 seconds
d = 6.5 * 38.5 = 250.25 km

1. 👍 0
2. 👎 0
2. Thank you!

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Physics

Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase

asked by Blah on October 19, 2012
2. ### Physics

The velocity of the transverse waves produced by an earthquake is 7.2 km/s, while that of the longitudinal waves is 4.2 km/s. A seismograph records the arrival of the transverse waves 68 s before that of the longitudinal waves.

asked by Einstein on December 14, 2007
3. ### Science

What is the main difference between mechanical and electromagnetic waves? A. Mechanical weaves involved transfers energy; electromagnetic waves do not B. Mechanical waves require a medium to travel in; electromagnetic waves do

asked by I need help on March 13, 2017
4. ### physics

An earthquake generates three kinds of waves: surface waves (L waves), which are the slowest and weakest; shear (S) waves, which are transverse waves and carry most of the energy; and pressure (P) waves, which are longitudinal

asked by maria on October 24, 2011
1. ### Science

1. Which of the following statements about mechanical waves is true? a. mechanical waves require a medium to travel through b. mechanical waves do not have amplitude and wavelength c. mechanical waves do not have frequency d.

asked by Thank you! on May 14, 2018
2. ### science help

Which of the following types of waves has the least amount of energy? Gamma rays Microwaves Radio waves Rays is it c

asked by Oscar on December 22, 2015
3. ### Science

1. Which of the following statements about mechanical waves is true? Mechanical waves require a medium to travel through. Mechanical waves do not have amplitude and wavelength.** Mechanical waves do not have frequency. Mechanical

asked by Tristan Seymour on April 25, 2019
4. ### physics

Which of the following conditions is not necessary to observe an interference pattern between two sets of waves? Choose one answer. a. The waves must have the same wavelength. b. The waves must have a constant phase difference. c.

asked by ashley -- on April 17, 2011
1. ### physics

When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a speed of about 8.0 km/s and the secondary, or S, wave has a speed of about 4.5 km/s. A seismograph,

asked by Anonymous on December 5, 2014
2. ### physics

Two small loudspeakers emit sound waves of the same amplitude and frequency in phase with each other. The waves produce an interference pattern such that the distance from the right bisector to a point P on the third nodal line is

asked by tom on January 7, 2018
3. ### Physics

Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase

asked by Brian on May 10, 2015
4. ### physics

Waves on a particular string travel with a speed of 17 m/s. By what factor should the tension in this string be changed to produce waves with a speed of 102 m/s

asked by Will on February 7, 2012