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05 Jul 2023, 07:30
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Question 1
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (02:12) correct
21%
(02:13) wrong
based on 135
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
76% (00:41) correct 24%
(00:49) wrong
based on 127
sessions
History
Date
Time
Result
Not Attempted Yet
Tsunamis are huge, fast-moving waves that are capable of causing enormous destruction and loss of life if they broach the shoreline on a populated coast. To communities that have been devastated by such an event, the tsunami often seems to come out of nowhere, and survivors are mystified as to why such a huge wave could appear with so little warning. The terrifying suddenness of a tsunami’s arrival is a consequence of where and how they are created.
When submarine tectonic activity distorts the sea floor, it vertically displaces the overlying sea water. As the displaced water seeks equilibrium under the influence of gravity, waves form, and when the distortion is of sufficient magnitude, a tsunami can result. If the earthquake occurs near the shore, the tsunami may take only minutes to reach a populated coast.
Tsunamis attain their enormous heights through a process of decreasing speed and increasing height. The energy flux of a tsunami is constant, which leads to an inversely proportional relationship between the wave’s speed and its height. Since speed is directly proportional to water depth, as the wave approaches shallower water, its speed decreases, causing its height to increase to compensate for the loss and thus maintain the wave’s energy flux. Through this process, a barely perceptible deep ocean wave formed by an earthquake far from shore can rapidly transform into a tsunami that can exceed 30 meters at its final runup height, which it attains onshore above sea level.
When submarine tectonic activity distorts the sea floor, it vertically displaces the overlying sea water. As the displaced water seeks equilibrium under the influence of gravity, waves form, and when the distortion is of sufficient magnitude, a tsunami can result. If the earthquake occurs near the shore, the tsunami may take only minutes to reach a populated coast.
Tsunamis attain their enormous heights through a process of decreasing speed and increasing height. The energy flux of a tsunami is constant, which leads to an inversely proportional relationship between the wave’s speed and its height. Since speed is directly proportional to water depth, as the wave approaches shallower water, its speed decreases, causing its height to increase to compensate for the loss and thus maintain the wave’s energy flux. Through this process, a barely perceptible deep ocean wave formed by an earthquake far from shore can rapidly transform into a tsunami that can exceed 30 meters at its final runup height, which it attains onshore above sea level.
1. The author is primarily concerned with
A. establishing that tsunamis are formed by submarine tectonic activity.
B. explaining why tsunamis can appear so suddenly and with so little warning.
C. arguing that a tsunami’s energy flux results in its great height and destructive capacity.
D. demonstrating that devastating tsunamis must be formed by earthquakes close to shore.
E. challenging long-held beliefs about the formation of deep ocean waves.
A. establishing that tsunamis are formed by submarine tectonic activity.
B. explaining why tsunamis can appear so suddenly and with so little warning.
C. arguing that a tsunami’s energy flux results in its great height and destructive capacity.
D. demonstrating that devastating tsunamis must be formed by earthquakes close to shore.
E. challenging long-held beliefs about the formation of deep ocean waves.
2. It may be inferred from the passage that a tsunami that entered deeper water would experience an increase in
A. destructive power
B. speed
C. energy flux
D. visibility
E. height
A. destructive power
B. speed
C. energy flux
D. visibility
E. height
RC Butler 2023 - Practice Two RC Passages Everyday.
Passage # 222 Date: 05-Jul-2023
This question is part of RC Butler 2023. Click here for Details
Passage # 222 Date: 05-Jul-2023
This question is part of RC Butler 2023. Click here for Details
Kaplan GRE Verbal Workbook 2007
06 Apr 2024, 11:27
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Question 1 :The author is primarily concerned with
A: establishing that tsunamis are formed by submarine tectonic activity.
Establish means to prove ,but the author is not trying to prove anything here.
B: explaining why tsunamis can appear suddenly and with so little warning. This is true , the author says that people are mystified by how tsunamis can appear so suddenly and then the author goes on to explain the reason behind this in the next 2 paragraphs.
C: arguing that a tsunami’s energy flux results in its great height and destructive capacity.
The author does not argue about anything in this passage.
D: demonstrating that devastating tsunamis must be formed by earthquakes close to shore.
Tsunamis are not always formed close to the shore.
E: challenging long-held beliefs about the formation of deep ocean waves.
The author shows no beliefs of any other people.
Question 2 : It may be inferred from the passage that a tsunami that entered deeper water would experience an increase in
A: destructive power
B : speed
C: energy flux
D: visibility
E: height
The author says in paragraph 3 that the shallower the water , the slower the speed.This means speed is directly proportional to water depth.If the water depth increases that also means speed increases , meaning B is the correct choice.
Posted from my mobile device
A: establishing that tsunamis are formed by submarine tectonic activity.
Establish means to prove ,but the author is not trying to prove anything here.
B: explaining why tsunamis can appear suddenly and with so little warning. This is true , the author says that people are mystified by how tsunamis can appear so suddenly and then the author goes on to explain the reason behind this in the next 2 paragraphs.
C: arguing that a tsunami’s energy flux results in its great height and destructive capacity.
The author does not argue about anything in this passage.
D: demonstrating that devastating tsunamis must be formed by earthquakes close to shore.
Tsunamis are not always formed close to the shore.
E: challenging long-held beliefs about the formation of deep ocean waves.
The author shows no beliefs of any other people.
Question 2 : It may be inferred from the passage that a tsunami that entered deeper water would experience an increase in
A: destructive power
B : speed
C: energy flux
D: visibility
E: height
The author says in paragraph 3 that the shallower the water , the slower the speed.This means speed is directly proportional to water depth.If the water depth increases that also means speed increases , meaning B is the correct choice.
Posted from my mobile device
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