Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Dec 1511:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease.
Dec 1410:00 AM EST
-12:00 PM EST
Think a 100% GMAT Verbal score is out of your reach? Target Test Prep will make you think again! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.- Dec 14
11:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test. 
Dec 1608:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!- Dec 17
09:00 AM PST
-10:00 AM PST
Join Manhattan Prep instructor Whitney Garner for a fun—and thorough—review of logic-based (non-math) problems, with a particular emphasis on Data Sufficiency and Two-Parts. - Dec 18
10:00 AM PST
-11:00 AM PST
Here is the essential guide to securing scholarships as an MBA student! In this video, we explore the various types of scholarships available, including need-based and merit-based options.
Updated on: 01 Aug 2020, 09:18
Originally posted by Sajjad1994 on 26 Apr 2019, 07:53.
Last edited by Sajjad1994 on 01 Aug 2020, 09:18, edited 2 times in total.
Last edited by Sajjad1994 on 01 Aug 2020, 09:18, edited 2 times in total.
Updated - Complete topic (861).
Kudos
Bookmarks
Question 1
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
48% (03:13) correct
52%
(03:11) wrong
based on 284
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
68% (01:08) correct 32%
(01:12) wrong
based on 318
sessions
History
Date
Time
Result
Not Attempted Yet
Question 3
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
89% (00:54) correct 11%
(01:02) wrong
based on 297
sessions
History
Date
Time
Result
Not Attempted Yet
Question 4
C
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:
78% (00:56) correct 22%
(01:30) wrong
based on 307
sessions
History
Date
Time
Result
Not Attempted Yet
Question 5
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
49% (00:54) correct 51%
(01:10) wrong
based on 300
sessions
History
Date
Time
Result
Not Attempted Yet
Question 6
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
55% (01:30) correct 45%
(01:24) wrong
based on 278
sessions
History
Date
Time
Result
Not Attempted Yet
New Project RC Butler 2019 - Practice 2 RC Passages Everyday
Passage # 169, Date : 26-APR-2019
This post is a part of New Project RC Butler 2019. Click here for Details
Passage # 169, Date : 26-APR-2019
This post is a part of New Project RC Butler 2019. Click here for Details
The astronomical study of hot gas—gas with a temperature of a million degrees Kelvin or greater—began with observations of the solar atmosphere. In the 1930s, techniques were developed to perform optical studies of the solar corona during solar eclipses. The detection of highly ionized atoms of iron, calcium, and nickel, as well as an extended gaseous region, implied the presence of gas at temperatures of about a million degrees K. However, detailed study of the solar corona had to await the advent of space astronomy and the chance to observe the sun at ultraviolet and X-ray wavelengths outside the earth’s opaque atmosphere. These wavelengths are crucial for studying hot gas because highly ionized atoms are visible in these regions and because most radiated energy is emitted there.
Recent study of hot gas began with the launching in the 1970s of space observatories which gathered data on ultraviolet and X-ray wavelengths. These observations led to a new picture of the production and evolution of hot gas. Before 1970, direct evidence for the presence of hot gas in large volumes of space was lacking. Although there were theoretical arguments for pervasive interstellar gas, interstellar space in our galaxy was thought to be occupied by gas with a temperature of about 10,000 degrees K. In the 1970s, however, the observatory Copernicus revealed the widespread presence in our galaxy of highly ionized oxygen that could only be produced at high temperatures. At the same time, the Uhuru X-ray satellite discovered emissions from hot gas in the space between galaxies in clusters. Subsequent studies confirmed these findings.
It is believed that interstellar gas is heated through two mechanisms: the motions of stars and matter ejected from them, and gravitational infall. Hot gas has been observed on a smaller scale, between stars in our galaxy, and in largescale structures (clusters of galaxies). On a smaller scale, supernovae, or exploding stars, probably create an interstellar medium of hot gas within galaxies; they may also drive gas out of galaxies. On a larger scale, gravitational infall during which gas slumps toward the center of a galaxy—may play a role in the heating of gas.
Recent study of hot gas began with the launching in the 1970s of space observatories which gathered data on ultraviolet and X-ray wavelengths. These observations led to a new picture of the production and evolution of hot gas. Before 1970, direct evidence for the presence of hot gas in large volumes of space was lacking. Although there were theoretical arguments for pervasive interstellar gas, interstellar space in our galaxy was thought to be occupied by gas with a temperature of about 10,000 degrees K. In the 1970s, however, the observatory Copernicus revealed the widespread presence in our galaxy of highly ionized oxygen that could only be produced at high temperatures. At the same time, the Uhuru X-ray satellite discovered emissions from hot gas in the space between galaxies in clusters. Subsequent studies confirmed these findings.
It is believed that interstellar gas is heated through two mechanisms: the motions of stars and matter ejected from them, and gravitational infall. Hot gas has been observed on a smaller scale, between stars in our galaxy, and in largescale structures (clusters of galaxies). On a smaller scale, supernovae, or exploding stars, probably create an interstellar medium of hot gas within galaxies; they may also drive gas out of galaxies. On a larger scale, gravitational infall during which gas slumps toward the center of a galaxy—may play a role in the heating of gas.
1. Which of the following can be inferred from the passage about “recent study of hot gas” (Highlighted)?
(A) It has prompted the rejection of earlier studies of the solar corona.
(B) It has taken place largely outside the earth’s atmosphere.
(C) It has led to full understanding of the production and evolution of hot gas.
(D) It was aimed primarily at gathering data related to the birth and death of stars.
(E) It was hindered by astronomers’ dependence on outdated research techniques.
2. Which of the following is mentioned in the passage as evidence for the presence of hot interstellar gas in our galaxy?
(A) The varying levels of radiation given off by distant stars
(B) The large quantity of ionized atoms detected during solar eclipses
(C) The presence of gas with a temperature of about 10,000 degrees K in our galaxy
(D) The production of highly ionized oxygen in our galaxy
(E) The frequent occurrence of supernovae in our galaxy
3. According to the passage, the Uhuru X-ray satellite has been instrumental in helping to
(A) provide detailed images of the remnants of supernovae in our galaxy
(B) determine the precise sequence of events leading to a supernova
(C) document the widespread presence of hot gas in interstellar space
(D) identify the different types of particles commonly ejected by stars
(E) measure the varying strength of gravitational fields at galactic centers
4. The author suggests that the studies of the solar atmosphere discussed in the first paragraph
(A) conflict with current assumptions about the extent of the gaseous region surrounding the sun
(B) reached conclusions which were overlooked by later studies
(C) were constrained by the technology then available to scientists
(D) confirmed then-current beliefs about the presence of hot gas between stars
(E) are largely irrelevant to recent studies of hot gas
5. Which of the following best describes how the second paragraph relates to the first paragraph?
(A) The second paragraph qualifies a conclusion stated in the first paragraph.
(B) The second paragraph elaborates on developments identified in the first paragraph.
(C) The second paragraph examines in detail the particular studies referred to in the first paragraph.
(D) The second paragraph identifies a more fruitful area of study than that discussed in the first paragraph.
(E) The second paragraph illustrates the degree of speculation involved in the studies mentioned in the first paragraph.
6. The passage specifically mentions information relevant to all of the following questions EXCEPT:
(A) In what way does hot gas affect the evolution of stellar systems?
(B) What may result from the migration of gas toward the center of a galaxy?
(C) What effect can the release of energy during a stellar explosion have on interstellar gas?
(D) What evidence have researchers gathered for the presence of hot gas near the sun?
(E) Why is the ability to monitor ultraviolet and X-ray wavelengths necessary for the study of hot gas?
(A) It has prompted the rejection of earlier studies of the solar corona.
(B) It has taken place largely outside the earth’s atmosphere.
(C) It has led to full understanding of the production and evolution of hot gas.
(D) It was aimed primarily at gathering data related to the birth and death of stars.
(E) It was hindered by astronomers’ dependence on outdated research techniques.
2. Which of the following is mentioned in the passage as evidence for the presence of hot interstellar gas in our galaxy?
(A) The varying levels of radiation given off by distant stars
(B) The large quantity of ionized atoms detected during solar eclipses
(C) The presence of gas with a temperature of about 10,000 degrees K in our galaxy
(D) The production of highly ionized oxygen in our galaxy
(E) The frequent occurrence of supernovae in our galaxy
3. According to the passage, the Uhuru X-ray satellite has been instrumental in helping to
(A) provide detailed images of the remnants of supernovae in our galaxy
(B) determine the precise sequence of events leading to a supernova
(C) document the widespread presence of hot gas in interstellar space
(D) identify the different types of particles commonly ejected by stars
(E) measure the varying strength of gravitational fields at galactic centers
4. The author suggests that the studies of the solar atmosphere discussed in the first paragraph
(A) conflict with current assumptions about the extent of the gaseous region surrounding the sun
(B) reached conclusions which were overlooked by later studies
(C) were constrained by the technology then available to scientists
(D) confirmed then-current beliefs about the presence of hot gas between stars
(E) are largely irrelevant to recent studies of hot gas
5. Which of the following best describes how the second paragraph relates to the first paragraph?
(A) The second paragraph qualifies a conclusion stated in the first paragraph.
(B) The second paragraph elaborates on developments identified in the first paragraph.
(C) The second paragraph examines in detail the particular studies referred to in the first paragraph.
(D) The second paragraph identifies a more fruitful area of study than that discussed in the first paragraph.
(E) The second paragraph illustrates the degree of speculation involved in the studies mentioned in the first paragraph.
6. The passage specifically mentions information relevant to all of the following questions EXCEPT:
(A) In what way does hot gas affect the evolution of stellar systems?
(B) What may result from the migration of gas toward the center of a galaxy?
(C) What effect can the release of energy during a stellar explosion have on interstellar gas?
(D) What evidence have researchers gathered for the presence of hot gas near the sun?
(E) Why is the ability to monitor ultraviolet and X-ray wavelengths necessary for the study of hot gas?
26 Apr 2019, 22:17
Kudos
Bookmarks
All except question 6 correct in 11 mins, including almost 4 mins to read
Para 1- astronomical study of hot gas, Earlier studies, implied presence of hot gases
Para 2- more detailed study using ultraviolet and X-ray
Para 3- interstellar gas is heated through two mechanisms
1. Which of the following can be inferred from the passage about “recent study of hot gas” (Highlighted)?
(B) It has taken place largely outside the earth’s atmosphere.
However, detailed study of the solar corona had to await the advent of space astronomy and the chance to observe the sun at ultraviolet and X-ray wavelengths outside the earth’s opaque atmosphere.
Recent study of hot gas began with the launching in the 1970s of space observatories which gathered data on ultraviolet and X-ray wavelengths.
2. Which of the following is mentioned in the passage as evidence for the presence of hot interstellar gas in our galaxy?
(D) The production of highly ionized oxygen in our galaxy
In the 1970s, however, the observatory Copernicus revealed the widespread presence in our galaxy of highly ionized oxygen that could only be produced at high temperatures.
3. According to the passage, the Uhuru X-ray satellite has been instrumental in helping to
(C) document the widespread presence of hot gas in interstellar space
the Uhuru X-ray satellite discovered emissions from hot gas in the space between galaxies in clusters. Subsequent studies confirmed these findings.
4. The author suggests that the studies of the solar atmosphere discussed in the first paragraph
(C) were constrained by the technology then available to scientists
However, detailed study of the solar corona had to await the advent of space astronomy and the chance to observe the sun at ultraviolet and X-ray wavelengths outside the earth’s opaque atmosphere.
5. Which of the following best describes how the second paragraph relates to the first paragraph?
(B) The second paragraph elaborates on developments identified in the first paragraph.
However, detailed study of the solar corona had to await the advent of space astronomy and the chance to observe the sun at ultraviolet and X-ray wavelengths outside the earth’s opaque atmosphere. These wavelengths are crucial for studying hot gas because highly ionized atoms are visible in these regions and because most radiated energy is emitted there.
Recent study of hot gas began with the launching in the 1970s of space observatories which gathered data on ultraviolet and X-ray wavelengths.
6. The passage specifically mentions information relevant to all of the following questions EXCEPT:
(A) In what way does hot gas affect the evolution of stellar systems?- correct
(B) What may result from the migration of gas toward the center of a galaxy?- incorrect, On a larger scale, gravitational infall during which gas slumps toward the center of a galaxy—may play a role in the heating of gas.
(C) What effect can the release of energy during a stellar explosion have on interstellar gas?- incorrect, On a smaller scale, supernovae, or exploding stars, probably create an interstellar medium of hot gas within galaxies; they may also drive gas out of galaxies
(D) What evidence have researchers gathered for the presence of hot gas near the sun?- incorrect, The detection of highly ionized atoms of iron, calcium, and nickel, as well as an extended gaseous region, implied the presence of gas at temperatures of about a million degrees K.
(E) Why is the ability to monitor ultraviolet and X-ray wavelengths necessary for the study of hot gas? - incorrect, These wavelengths are crucial for studying hot gas because highly ionized atoms are visible in these regions and because most radiated energy is emitted there.
Para 1- astronomical study of hot gas, Earlier studies, implied presence of hot gases
Para 2- more detailed study using ultraviolet and X-ray
Para 3- interstellar gas is heated through two mechanisms
1. Which of the following can be inferred from the passage about “recent study of hot gas” (Highlighted)?
(B) It has taken place largely outside the earth’s atmosphere.
However, detailed study of the solar corona had to await the advent of space astronomy and the chance to observe the sun at ultraviolet and X-ray wavelengths outside the earth’s opaque atmosphere.
Recent study of hot gas began with the launching in the 1970s of space observatories which gathered data on ultraviolet and X-ray wavelengths.
2. Which of the following is mentioned in the passage as evidence for the presence of hot interstellar gas in our galaxy?
(D) The production of highly ionized oxygen in our galaxy
In the 1970s, however, the observatory Copernicus revealed the widespread presence in our galaxy of highly ionized oxygen that could only be produced at high temperatures.
3. According to the passage, the Uhuru X-ray satellite has been instrumental in helping to
(C) document the widespread presence of hot gas in interstellar space
the Uhuru X-ray satellite discovered emissions from hot gas in the space between galaxies in clusters. Subsequent studies confirmed these findings.
4. The author suggests that the studies of the solar atmosphere discussed in the first paragraph
(C) were constrained by the technology then available to scientists
However, detailed study of the solar corona had to await the advent of space astronomy and the chance to observe the sun at ultraviolet and X-ray wavelengths outside the earth’s opaque atmosphere.
5. Which of the following best describes how the second paragraph relates to the first paragraph?
(B) The second paragraph elaborates on developments identified in the first paragraph.
However, detailed study of the solar corona had to await the advent of space astronomy and the chance to observe the sun at ultraviolet and X-ray wavelengths outside the earth’s opaque atmosphere. These wavelengths are crucial for studying hot gas because highly ionized atoms are visible in these regions and because most radiated energy is emitted there.
Recent study of hot gas began with the launching in the 1970s of space observatories which gathered data on ultraviolet and X-ray wavelengths.
6. The passage specifically mentions information relevant to all of the following questions EXCEPT:
(A) In what way does hot gas affect the evolution of stellar systems?- correct
(B) What may result from the migration of gas toward the center of a galaxy?- incorrect, On a larger scale, gravitational infall during which gas slumps toward the center of a galaxy—may play a role in the heating of gas.
(C) What effect can the release of energy during a stellar explosion have on interstellar gas?- incorrect, On a smaller scale, supernovae, or exploding stars, probably create an interstellar medium of hot gas within galaxies; they may also drive gas out of galaxies
(D) What evidence have researchers gathered for the presence of hot gas near the sun?- incorrect, The detection of highly ionized atoms of iron, calcium, and nickel, as well as an extended gaseous region, implied the presence of gas at temperatures of about a million degrees K.
(E) Why is the ability to monitor ultraviolet and X-ray wavelengths necessary for the study of hot gas? - incorrect, These wavelengths are crucial for studying hot gas because highly ionized atoms are visible in these regions and because most radiated energy is emitted there.
27 Apr 2019, 06:55
Kudos
Bookmarks
Hi ,
Why is question 1 option C is incorrect?
My understanding: 1) Nothing about evolution of hot gas is stated.
2) Full understanding depends from person to person, so we cannot conclude that it led to full understanding.
Please let me know whether my reasoning is correct.
Thanks in Advance
Why is question 1 option C is incorrect?
My understanding: 1) Nothing about evolution of hot gas is stated.
2) Full understanding depends from person to person, so we cannot conclude that it led to full understanding.
Please let me know whether my reasoning is correct.
Thanks in Advance
