15. If the incident angle is 45 degrees and the seismic velocity in the first medium is a reasonable value for sediments, and the seismic velocity in the second medium is 4 times slower than in the first medium, then the refracted angle a. Is less than 45 degrees. b. Is more than 45 degrees. c. Is 45 degrees. d. Cannot be determined given this information. 16. Assume that the earth is represented by a horizontal layer overlying a half-space. A simplest refraction survey with minimum instrument requires a. one shot and one geophone b. one shot and two geophones c. one shot and three geophones d. two shots with two geophones 17. You carried out a single-shot seismic reflection survey to find the depth to the basement and the velocity structure. Exact knowledge about the material above the basement and the shape of the basement interface was not known. After carrying out the survey he picked out the first arrivals and plotted the T-X graph as below. What conclusion can you make? a. he can only see one refraction so there is only one layer overlaying the basement b. he can determine the velocity of the basement by measuring the slope of the dashed line c. he can estimate the critical angle using the intercept time of the refraction arrival d. none of the above T 18. The acoustic impedance of a medium a. is equal to the value of the seismic velocity b. depends upon the product of density and velocity c. depends upon the ratio of density and velocity d. depends upon velocity and bulk modulus 19. "Seismic reflections can occur when only when there is a change in seismic velocity". (This is a Right – Wrong question for a final mark. Correct gets one mark; wrong loses a mark) a. TRUE b. FALSE c. Collecting seismic measurement requires contact with the ground while collecting magnetic data can be done at the surface or airborne. d. All of the above 20. Acoustic impedance is used to describe the efficiency of seismic reflection and transmission. Its value depends upon a. critical angle and velocity b. velocity and density c. reflection and transmission coefficients d. layer thickness and velocity
15. If the incident angle is 45 degrees and the seismic velocity in the first medium is a reasonable value for sediments, and the seismic velocity in the second medium is 4 times slower than in the first medium, then the refracted angle a. Is less than 45 degrees. b. Is more than 45 degrees. c. Is 45 degrees. d. Cannot be determined given this information. 16. Assume that the earth is represented by a horizontal layer overlying a half-space. A simplest refraction survey with minimum instrument requires a. one shot and one geophone b. one shot and two geophones c. one shot and three geophones d. two shots with two geophones 17. You carried out a single-shot seismic reflection survey to find the depth to the basement and the velocity structure. Exact knowledge about the material above the basement and the shape of the basement interface was not known. After carrying out the survey he picked out the first arrivals and plotted the T-X graph as below. What conclusion can you make? a. he can only see one refraction so there is only one layer overlaying the basement b. he can determine the velocity of the basement by measuring the slope of the dashed line c. he can estimate the critical angle using the intercept time of the refraction arrival d. none of the above T 18. The acoustic impedance of a medium a. is equal to the value of the seismic velocity b. depends upon the product of density and velocity c. depends upon the ratio of density and velocity d. depends upon velocity and bulk modulus 19. "Seismic reflections can occur when only when there is a change in seismic velocity". (This is a Right – Wrong question for a final mark. Correct gets one mark; wrong loses a mark) a. TRUE b. FALSE c. Collecting seismic measurement requires contact with the ground while collecting magnetic data can be done at the surface or airborne. d. All of the above 20. Acoustic impedance is used to describe the efficiency of seismic reflection and transmission. Its value depends upon a. critical angle and velocity b. velocity and density c. reflection and transmission coefficients d. layer thickness and velocity
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
Related questions
Question
I need answer within 20 minutes please please with my best wishes
Transcribed Image Text:15. If the incident angle is 45 degrees and the seismic velocity in the first medium is a reasonable
value for sediments, and the seismic velocity in the second medium is 4 times slower than in the first
medium, then the refracted angle
a. Is less than 45 degrees.
b. Is more than 45 degrees.
c. Is 45 degrees.
d. Cannot be determined given this information.
16. Assume that the earth is represented by a horizontal layer overlying a half-space. A simplest
refraction survey with minimum instrument requires
a. one shot and one geophone
b. one shot and two geophones
c. one shot and three geophones
d. two shots with two geophones
17. You carried out a single-shot seismic reflection survey to find the depth to the basement and the
velocity structure. Exact knowledge about the
material above the basement and the shape of the
basement interface was not known. After carrying
out the survey he picked out the first arrivals and
plotted the T-X graph as below. What conclusion
can you make?
a. he can only see one refraction so there is only one
layer overlaying the basement
b. he can determine the velocity of the basement by
measuring the slope of the dashed line
c. he can estimate the critical angle using the
intercept time of the refraction arrival
d. none of the above
T
18. The acoustic impedance of a medium
a. is equal to the value of the seismic velocity
b. depends upon the product of density and velocity
c. depends upon the ratio of density and velocity
d. depends upon velocity and bulk modulus
19. "Seismic reflections can occur when only when there is a change in seismic velocity". (This is a
Right - Wrong question for a final mark. Correct gets one mark; wrong loses a mark)
a. TRUE
b. FALSE
c. Collecting seismic measurement requires contact with the ground while collecting magnetic data can be
done at the surface or airborne.
d. All of the above
20. Acoustic impedance is used to describe the efficiency of seismic reflection and transmission. Its
value depends upon
a. critical angle and velocity
b. velocity and density
c. reflection and transmission coefficients
d. layer thickness and velocity
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Recommended textbooks for you
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:
9780321820464
Author:
Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:
Addison-Wesley
College Physics: A Strategic Approach (4th Editio…
Physics
ISBN:
9780134609034
Author:
Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:
PEARSON