Conceptual Physical Science - Access
6th Edition
ISBN: 9781323459720
Author: Hewitt
Publisher: PEARSON
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Chapter 21, Problem 36TAS
The Richter magnitude scale is logarithmic, meaning that each increase of 1 point on the scale corresponds to an increase by a factor of 10 in the amplitude of the seismic waves recorded on a seismograph. An earthquake that measures magnitude 8 on the scale has hoe many times more ground-shaking effect than a quake that measures magnitude 6?
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The Richter Scale is used for measuring the magnitude of earthquakes. the magnitude of an earthquake is, by deifnition, measured 100 kilometers from its originating point, and is given by the equation M = log(s/10^-4), where S is the "strength" of the earthquake, as determined by the shockwaves it sends through the ground. Earthquake strengths vary greatly from 0 in some cases to 800,000,000 or more in other cases which is why a logarithmic scale is used to measure their magnitudes.
Part A
One of the strongest earthquakes ever recorded had a magnitude of 8.9 on the Richter Scale.
i) Determine the strength of this earthquake.
ii) What would be the magnitude of an earthquake four times weaker than this one?
iii) How many times stronger was this earthquake than the magnitude 2 earthquake that stuck central New Jersey in 2012?
Part B
Suppose a given earthquake is twice as strong as another earthquake. Determine the difference in magnitude of these earthquakes.
Part C
The largest…
The Richter Scale is used for measuring the magnitude of earthquakes. the magnitude of an earthquake is, by deifnition, measured 100 kilometers from its originating point, and is given by the equation M = log(s/10^-4), where S is the "strength" of the earthquake, as determined by the shockwaves it sends through the ground. Earthquake strengths vary greatly from 0 in some cases to 800,000,000 or more in other cases which is why a logarithmic scale is used to measure their magnitudes.
(I already know Part A)
Part B
Suppose a given earthquake is twice as strong as another earthquake. Determine the difference in magnitude of these earthquakes.
Part C
The largest manmade explosion was the test detonation of the Tsar Bomba hydrogen bomb. It was equivalent to about 50 million tons of TNT. It was similar in intensity to a magnitude 8.5 earthquake. The stronger earthquake ever recorded was the 1960 Valdivia earthquake than the Tsar Bomba? How much TNT was the earthquake equivalent to? Show…
The acoustic impedance of a mediuma. is equal to the value of the seismic velocityb. depends upon the product of density and velocityc. depends upon the ratio of density and velocityd. depends upon velocity and bulk modulus
Chapter 21 Solutions
Conceptual Physical Science - Access
Ch. 21 - How do P-waves travel through Earths interior? How...Ch. 21 - Can S-waves travel through liquids?.Ch. 21 - Prob. 3RCQCh. 21 - What was the major contribution of Andrija...Ch. 21 - How did seismic waves contribute to the discovery...Ch. 21 - What is the evidence that Earths inner core is...Ch. 21 - What is the evidence that Earths outer core is...Ch. 21 - In what ways are the asthenosphere and the...Ch. 21 - How does continental crust differ from oceanic...Ch. 21 - Why does continental crust stand higher on the...
Ch. 21 - Prob. 11RCQCh. 21 - Prob. 12RCQCh. 21 - Prob. 13RCQCh. 21 - Where are the deepest parts of the ocean?Ch. 21 - Prob. 15RCQCh. 21 - How is the ocean floor similar to a gigantic,...Ch. 21 - Prob. 17RCQCh. 21 - Name and describe the three types of plate...Ch. 21 - The lithosphere moves because of convection...Ch. 21 - What is a rift? Give an example.Ch. 21 - Prob. 21RCQCh. 21 - Prob. 22RCQCh. 21 - What is a transform boundary?Ch. 21 - Are folded rocks primarily the result of...Ch. 21 - Distinguish between anticlines and synclines.Ch. 21 - What is the difference between reverse faults and...Ch. 21 - Prob. 27RCQCh. 21 - What happens to rock when stress exceeds a rocks...Ch. 21 - Where are most of the worlds volcanoes formed?Ch. 21 - Prob. 30RCQCh. 21 - Prob. 34TASCh. 21 - Prob. 35TASCh. 21 - The Richter magnitude scale is logarithmic,...Ch. 21 - If the rate of movement along a fault is known,...Ch. 21 - The San Andreas Fault separates the...Ch. 21 - Prob. 39TARCh. 21 - Prob. 40TARCh. 21 - Prob. 41TARCh. 21 - Prob. 42TARCh. 21 - Prob. 43TARCh. 21 - Prob. 44ECh. 21 - How can seismic waves indicate whether regions...Ch. 21 - How do seismic waves indicate layering of...Ch. 21 - What does the P-wave shadow tell us about Earth's...Ch. 21 - What is the evidence that Earth's inner core is...Ch. 21 - Even though the inner and outer cores are both...Ch. 21 - If Earth's mantle is composed of rock, how can we...Ch. 21 - Prob. 51ECh. 21 - Prob. 52ECh. 21 - Prob. 53ECh. 21 - Prob. 54ECh. 21 - Prob. 55ECh. 21 - Where and what is the most likely source of the...Ch. 21 - Prob. 57ECh. 21 - Prob. 58ECh. 21 - How is Earth's crust like a conveyor belt?Ch. 21 - Upon crystallization, certain minerals (the most...Ch. 21 - What is meant by magnetic pole reversals? What...Ch. 21 - How are the theories of seafloor spreading and...Ch. 21 - Prob. 63ECh. 21 - Distinguish between continental drift and plate...Ch. 21 - Why are the most ancient rocks found on the...Ch. 21 - What kinds of plate boundaries are associated with...Ch. 21 - Prob. 67ECh. 21 - At what type of plate boundary were the...Ch. 21 - Prob. 69ECh. 21 - Prob. 71ECh. 21 - Magma is generated at divergent and convergent...Ch. 21 - Prob. 73ECh. 21 - Prob. 74ECh. 21 - Prob. 75ECh. 21 - Lithospheric rock is continuously created and...Ch. 21 - Subduction is the process of one lithospheric...Ch. 21 - Where does most of an earthquakes damage generally...Ch. 21 - What type of fault is associated with the 1964...Ch. 21 - The Mercalli scale measures earthquake intensity....Ch. 21 - How do faults and folds support the idea that...Ch. 21 - Why are most earthquakes generated near plate...Ch. 21 - Prob. 83ECh. 21 - Prob. 84ECh. 21 - What is the direct source of energy responsible...Ch. 21 - Prob. 86ECh. 21 - Prob. 87ECh. 21 - Strike-slip faults show horizontal motion. Where...Ch. 21 - If you found folded beds of sedimentary rock in...Ch. 21 - In an earthquake, does the release of energy...Ch. 21 - Are the present-day ocean basins a permanent...Ch. 21 - Are the present-day continents a permanent feature...Ch. 21 - Prob. 93ECh. 21 - Prob. 94ECh. 21 - During an earthquake, what type of land surface is...Ch. 21 - Prob. 96DQCh. 21 - As global temperatures increase, the polar ice...Ch. 21 - The FYI about the 2010 Chilean earthquake suggests...Ch. 21 - What clues can we use to recognize the boundaries...Ch. 21 - At divergent boundaries, basaltic magma is...Ch. 21 - The hypothesis of continental drift is not...Ch. 21 - Prob. 3RATCh. 21 - Prob. 4RATCh. 21 - Prob. 5RATCh. 21 - Earthquakes are caused by the (a) friction between...Ch. 21 - Seafloor spreading provided a driving force for...Ch. 21 - Prob. 8RATCh. 21 - Prob. 9RATCh. 21 - Rocks buckle and fold when subjected to (a)...
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- How is the root cause of earthquakes in Hawaii different from earthquakes in Southern California?arrow_forwardIf you wanted to live where the chances of a destructive earthquake were small, would you pick a location near a fault zone, near a mid ocean ridge, near a subduction zone, or on a volcanic island such as Hawaii? What are the relative risks of earthquakes at each of these locations?arrow_forwardWhat is the measurement of an earthquake releasing 3.2 x 10^10 joules of energy on the Richter scale?arrow_forward
- What is the ratio of the intensities of an earthquake P-wave passing through the Earth and detected at two points 20 km and 60 km from the source? What is the ratio of the amplitudes?arrow_forwardAn earthquake emits both S-waves and P-waves which travel at different speeds through the Earth. A P-wave travels at 9 000 m/s and an S-wave travels at 5 000 m/s. If P-waves are received at a seismic station 1.00 minute before an S-wave arrives, how far away is the earthquake center?arrow_forwardEarthquakes at fault lines in Earth's crust create seismic waves, which are longitudinal (P-waves) or transverse (S-waves). The P-waves have a speed of about 6 km/s. Estimate the average bulk modulus of Earth's crust given that the density of rock is about 2,800 kg/m3.arrow_forward
- Earthquakes generate two type of seismic wave:• P waves, which are longitudinal• S waves, which are transverseExplain the difference between longitudinal and transverse waves in the context ofseismic waves.arrow_forwardIf the time difference between the arrival of P-waves and the arrival of S-waves is 60, approximately how far are you from the epicenter of the earthquake?arrow_forwardAn earthquake emits both S-waves and P-waves which travel at different speeds through the Earth. A P-wave travels at 9,000 m/s and an S-wave travels at 5,000m/s. If P-waves are received at a seismic station 1.00 minute before an S-wave arrives, how far away is the earthquake cearrow_forward
- 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/skm/s while the S-waves move at about 3.5 km/skm/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 33 ss, how far from the seismic station did the earthquake occur? Express your answer in kilometers d = __________kmarrow_forwardIf the time interval between the arrival of P and S is 10 seconds, how far away did the earthquake originate? Assume an average velocity of P of 6km/s and for S of 4km/s.arrow_forwardEarthquakes 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 33 s, how far from the seismic station did the earthquake occur?arrow_forward
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