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# Virtually everything astronomers known about objects

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Virtually everything astronomers known about objects  [#permalink]

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Updated on: 23 Aug 2018, 22:15
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Quote:
Part of New RC Series- Please check this link for more questions

Virtually everything astronomers known about objects outside the solar system is based on the detection of photons—quanta of electromagnetic radiation. Yet there is another form of radiation that permeates the universe: neutrinos. With (as its name implies) no electric charge, and negligible mass, the neutrino interacts with other particles so rarely that a neutrino can cross the entire universe, even traversing substantial aggregations of matter, without being absorbed or even deflected. Neutrinos can thus escape from regions of space where light and other kinds of electromagnetic radiation are blocked by matter. Furthermore, neutrinos carry with them information about the site and circumstances of their production: therefore, the detection of cosmic neutrinos could provide new information about a wide variety of cosmic phenomena and about the history of the universe.
But how can scientists detect a particle that interacts so infrequently with other matter? Twenty-five years passed between Pauli’s hypothesis that the neutrino existed and its actual detection: since then virtually all research with neutrinos has been with neutrinos created artificially in large particle accelerators and studied under neutrino microscopes. But a neutrino telescope, capable of detecting cosmic neutrinos, is difficult to construct. No apparatus can detect neutrinos unless it is extremely massive, because great mass is synonymous with huge numbers of nucleons (neutrons and protons), and the more massive the detector, the greater the probability of one of its nucleon’s reacting with a neutrino. In addition, the apparatus must be sufficiently shielded from the interfering effects of other particles.

Fortunately, a group of astrophysicists has proposed a means of detecting cosmic neutrinos by harnessing the mass of the ocean. Named DUMAND, for Deep Underwater Muon and Neutrino Detector, the project calls for placing an array of light sensors at a depth of five kilometers under the ocean surface. The detecting medium is the seawater itself: when a neutrino interacts with a particle in an atom of seawater, the result is a cascade of electrically charged particles and a flash of light that can be detected by the sensors. The five kilometers of seawater above the sensors will shield them from the interfering effects of other high-energy particles raining down through the atmosphere.

The strongest motivation for the DUMAND project is that it will exploit an important source of information about the universe. The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars. Each of these discoveries came as a surprise. Neutrino astronomy will doubtless bring its own share of surprises.
1. Which of the following titles best summarizes the passage as a whole?
(A) At the Threshold of Neutrino Astronomy
(B) Neutrinos and the History of the Universe
(C) The Creation and Study of Neutrinos
(D) The DUMAND System and How It Works
(E) The Properties of the Neutrino

2. With which of the following statements regarding neutrino astronomy would the author be most likely to agree?
(A) Neutrino astronomy will supersede all present forms of astronomy.
(B) Neutrino astronomy will be abandoned if the DUMAND project fails.
(C) Neutrino astronomy can be expected to lead to major breakthroughs in astronomy.
(D) Neutrino astronomy will disclose phenomena that will be more surprising than past discoveries.
(E) Neutrino astronomy will always be characterized by a large time lag between hypothesis and experimental confirmation.

3. In the last paragraph, the author describes the development of astronomy in order to
(A) suggest that the potential findings of neutrino astronomy can be seen as part of a series of astronomical successes
(B) illustrate the role of surprise in scientific discovery
(C) demonstrate the effectiveness of the DUMAND apparatus in detecting neutrinos
(D) name some cosmic phenomena that neutrino astronomy will illuminate
(E) contrast the motivation of earlier astronomers with that of the astrophysicists working on the DUMAND project

4. According to the passage, one advantage that neutrinos have for studies in astronomy is that they
(A) have been detected for the last twenty-five years
(B) possess a variable electric charge
(C) are usually extremely massive
(D) carry information about their history with them
(E) are very similar to other electromagnetic particles

5. According to the passage, the primary use of the apparatus mentioned in lines 24-32 would be to
(A) increase the mass of a neutrino
(B) interpret the information neutrinos carry with them
(C) study the internal structure of a neutrino
(D) see neutrinos in distant regions of space
(E) detect the presence of cosmic neutrinos

6. The passage states that interactions between neutrinos and other matter are
(A) rare
(B) artificial
(C) undetectable
(D) unpredictable
(E) hazardous

7. The passage mentions which of the following as a reason that neutrinos are hard to detect?
(A) Their pervasiveness in the universe
(B) Their ability to escape from different regions of space
(C) Their inability to penetrate dense matter
(D) The similarity of their structure to that of nucleons
(E) The infrequency of their interaction with other matter

8. According to the passage, the interaction of a neutrino with other matter can produce
(A) particles that are neutral and massive
(B) a form of radiation that permeates the universe
(C) inaccurate information about the site and circumstances of the neutrino’s production
(D) charged particles and light
(E) a situation in which light and other forms of electromagnetic radiation are blocked

9. According to the passage, one of the methods used to establish the properties of neutrinos was
(A) detection of photons
(B) observation of the interaction of neutrinos with gamma rays
(C) observation of neutrinos that were artificially created
(D) measurement of neutrinos that interacted with particles of seawater
(E) experiments with electromagnetic radiation

Originally posted by Praetorian on 24 Apr 2004, 05:00.
Last edited by workout on 23 Aug 2018, 22:15, edited 3 times in total.
Formatting
Senior Manager
Joined: 06 Dec 2003
Posts: 346
Location: India
Re: Virtually everything astronomers known about objects  [#permalink]

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25 Apr 2004, 22:17
Time 8 Minutes

1. B
2. C
3. A
4. D
5. E

Dharmin
CEO
Joined: 15 Aug 2003
Posts: 3390
Re: Virtually everything astronomers known about objects  [#permalink]

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28 Apr 2004, 19:36
Quote:
1. Time yourself
2. Solve as fast as you can
3. Please explain your solutions and mention your time taken

Virtually everything astronomers known about objects
outside the solar system is based on the detection of
photons-quanta of electromagnetic radiation. Yet there
is another form of radiation that permeates the universe:
(5) neutrinos. With (as its name implies) no electric charge,
and negligible mass, the neutrino interacts with other
particles so rarely that a neutrino can cross the entire
universe, even traversing substantial aggregations of
matter, without being absorbed or even deflected. Neu-
(10) trinos can thus escape from regions of space where light
and other kinds of electromagnetic radiation are blocked
by matter. Furthermore, neutrinos carry with them
information about the site and circumstances of their
production: therefore, the detection of cosmic neutrinos
(15) could provide new information about a wide variety of
cosmic phenomena and about the history of the uni-
verse.
But how can scientists detect a particle that interacts
so infrequently with other matter? Twenty-five years
(20) passed between Pauli's hypothesis that the neutrino
existed and its actual detection: since then virtually all
research with neutrinos has been with neutrinos created
artificially in large particle accelerators and studied
under neutrino microscopes. But a neutrino telescope,
(25) capable of detecting cosmic neutrinos, is difficult to co-
nstruct. No apparatus can detect neutrinos unless it is
extremely massive, because great mass is synonymous
with huge numbers of nucleons (neutrons and protons),
and the more massive the detector, the greater the pro-
(30) bability of one of its nucleon's reacting with a neutrino.
In addition, the apparatus must be sufficiently shielded
from the interfering effects of other particles.
Fortunately, a group of astrophysicists has proposed
a means of detecting cosmic neutrinos by harnessing the
(35) mass of the ocean. Named DUMAND, for Deep Under-
water Muon and Neutrino Detector, the project calls for
placing an array of light sensors at a depth of five kilo-
meters under the ocean surface. The detecting medium is
the seawater itself: when a neutrino interacts with a
(40)particle in an atom of seawater. the result is a cascade of
electrically charged particles and a flash of light that can
be detected by the sensors. The five kilometers of sea-
water above the sensors will shield them from the interf-
ering effects of other high-energy particles raining down
(45) through the atmosphere.
The strongest motivation for the DUMAND project
is that it will exploit an important source of information
about the universe. The extension of astronomy from
visible light to radio waves to x-rays and gamma rays
(50) never failed to lead to the discovery of unusual objects
such as radio galaxies, quasars, and pulsars. Each of
these discoveries came as a surprise. Neutrino astronomy
will doubtless bring its own share of surprises.

Quote:
1. Which of the following titles best summarizes the
passage as a whole?
(A) At the Threshold of Neutrino Astronomy
(B) Neutrinos and the History of the Universe
(C) The Creation and Study of Neutrinos
(D) The DUMAND System and How It Works
(E) The Properties of the Neutrino

Answer : A

Quote:
2. With which of the following statements regarding
neutrino astronomy would the author be most likely
to agree?
(A) Neutrino astronomy will supersede all present
forms of astronomy.
(B) Neutrino astronomy will be abandoned if the
DUMAND project fails.
(C) Neutrino astronomy can be expected to lead to
major breakthroughs in astronomy.
(D) Neutrino astronomy will disclose phenomena that
will be more surprising than past discoveries.
(E) Neutrino astronomy will always be characterized
by a large time lag between hypothesis and
experimental confirmation
.

Answer: C

Quote:
3. In the last paragraph, the author describes the
development of astronomy in order to
(A) suggest that the potential findings of neutrino
astronomy can be seen as part of a series of
astronomical successes
(B) illustrate the role of surprise in scientific discovery
(C) demonstrate the effectiveness of the DUMAND
apparatus in detecting neutrinos
(D) name some cosmic phenomena that neutrino
astronomy will illuminate
(E) contrast the motivation of earlier astronomers with
that of the astrophysicists working on the
DUMAND project

Answer: A

Quote:
4. According to the passage, one advantage that neutrinos
have for studies in astronomy is that they
(A) have been detected for the last twenty-five years
(B) possess a variable electric charge
(C) are usually extremely massive
(D) carry information about their history with them
(E) are very similar to other electromagnetic particles

Answer : D

Quote:
5. According to the passage, the primary use of the
apparatus mentioned in lines 24-32 would be to
(A) increase the mass of a neutrino
(B) interpret the information neutrinos carry with them
(C) study the internal structure of a neutrino
(D) see neutrinos in distant regions of space
(E) detect the presence of cosmic neutrinos

Answer: E
Senior Manager
Joined: 06 Dec 2003
Posts: 346
Location: India
Re: Virtually everything astronomers known about objects  [#permalink]

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29 Apr 2004, 03:33
Hi Praet,
Any suggestion to select proper title for topic ? Your feedback highly solicited on Question - 1 of this topic.

Dharmin
CEO
Joined: 15 Aug 2003
Posts: 3390
Re: Virtually everything astronomers known about objects  [#permalink]

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29 Apr 2004, 08:04
Dharmin wrote:
Hi Praet,
Any suggestion to select proper title for topic ? Your feedback highly solicited on Question - 1 of this topic.

Dharmin

i dont think there is a lot of "history of the universe" in this passage.

Read the first few lines of the passage.

Virtually everything astronomers known about objects
outside the solar system is based on the detection of
photons-quanta of electromagnetic radiation. Yet there
is another form of radiation that permeates the universe:
(5) neutrinos.

Its starts off by saying, virtually everything... and then introduces neutrinos...and then the entire passage is devoted to how neutrinos can be useful..

I hope this helps. If you read it once again, i am sure you will see the error in choosing B. I am quite sure the answer is A, but let me know if you disagree. we can discuss it.

Just a note about your error log.

This is a good candidate for your error log. just make a note for yourself saying... the first paragraph gives the most important clue about the title...of course you have to study the answer choices for choosing the right answer.

The more you practice RC's , the more closer you will get to a clearly defined strategy for yourself. Make notes for every mistake you make. no matter how boring this sounds, if you maintain this discipline, you might see a difference. Go over your log every time you start your prep.

Sincerely
Praet
SVP
Joined: 30 Oct 2003
Posts: 1754
Location: NewJersey USA
Re: Virtually everything astronomers known about objects  [#permalink]

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29 Apr 2004, 14:59
I aced this passage. I eliminated B for the first one because the Author does not mention about the history of the universe in the entire scope. I liked the word threshold because already Neutrinos can be detected and that itself is a major breakthrough ( mentioned in the begining of the second paragraph )

took 5 minutes

1.A
2.C
3.A
4.D
5.E
Senior Manager
Joined: 06 Dec 2003
Posts: 346
Location: India
Re: Virtually everything astronomers known about objects  [#permalink]

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30 Apr 2004, 03:00
Praetorian wrote:
This is a good candidate for your error log. just make a note for yourself saying... the first paragraph gives the most important clue about the title...of course you have to study the answer choices for choosing the right answer.

Correct praet, Thanks for reply. I accord you and i have taken this as a note, ofcourse to personal rc-log

Dharmin
Intern
Joined: 06 Jan 2004
Posts: 5
Location: Huntington Beach, CA
Re: Virtually everything astronomers known about objects  [#permalink]

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07 May 2004, 19:14
Time: 9 minutes.

Yeah!!! I got them all right.
Director
Joined: 04 Jan 2008
Posts: 781
Re: Virtually everything astronomers known about objects  [#permalink]

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Updated on: 23 Aug 2018, 22:09
6
1
Quote:
Part of New RC Series- Please check this link for more questions

Virtually everything astronomers known about objects outside the solar system is based on the detection of photons—quanta of electromagnetic radiation. Yet there is another form of radiation that permeates the universe: neutrinos. With (as its name implies) no electric charge, and negligible mass, the neutrino interacts with other particles so rarely that a neutrino can cross the entire universe, even traversing substantial aggregations of matter, without being absorbed or even deflected. Neutrinos can thus escape from regions of space where light and other kinds of electromagnetic radiation are blocked by matter. Furthermore, neutrinos carry with them information about the site and circumstances of their production: therefore, the detection of cosmic neutrinos could provide new information about a wide variety of cosmic phenomena and about the history of the universe.
But how can scientists detect a particle that interacts so infrequently with other matter? Twenty-five years passed between Pauli’s hypothesis that the neutrino existed and its actual detection: since then virtually all research with neutrinos has been with neutrinos created artificially in large particle accelerators and studied under neutrino microscopes. But a neutrino telescope, capable of detecting cosmic neutrinos, is difficult to construct. No apparatus can detect neutrinos unless it is extremely massive, because great mass is synonymous with huge numbers of nucleons (neutrons and protons), and the more massive the detector, the greater the probability of one of its nucleon’s reacting with a neutrino. In addition, the apparatus must be sufficiently shielded from the interfering effects of other particles.

Fortunately, a group of astrophysicists has proposed a means of detecting cosmic neutrinos by harnessing the mass of the ocean. Named DUMAND, for Deep Underwater Muon and Neutrino Detector, the project calls for placing an array of light sensors at a depth of five kilometers under the ocean surface. The detecting medium is the seawater itself: when a neutrino interacts with a particle in an atom of seawater, the result is a cascade of electrically charged particles and a flash of light that can be detected by the sensors. The five kilometers of seawater above the sensors will shield them from the interfering effects of other high-energy particles raining down through the atmosphere.

The strongest motivation for the DUMAND project is that it will exploit an important source of information about the universe. The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars. Each of these discoveries came as a surprise. Neutrino astronomy will doubtless bring its own share of surprises.
1. Which of the following titles best summarizes the passage as a whole?
(A) At the Threshold of Neutrino Astronomy
(B) Neutrinos and the History of the Universe
(C) The Creation and Study of Neutrinos
(D) The DUMAND System and How It Works
(E) The Properties of the Neutrino

2. With which of the following statements regarding neutrino astronomy would the author be most likely to agree?
(A) Neutrino astronomy will supersede all present forms of astronomy.
(B) Neutrino astronomy will be abandoned if the DUMAND project fails.
(C) Neutrino astronomy can be expected to lead to major breakthroughs in astronomy.
(D) Neutrino astronomy will disclose phenomena that will be more surprising than past discoveries.
(E) Neutrino astronomy will always be characterized by a large time lag between hypothesis and experimental confirmation.

3. In the last paragraph, the author describes the development of astronomy in order to
(A) suggest that the potential findings of neutrino astronomy can be seen as part of a series of astronomical successes
(B) illustrate the role of surprise in scientific discovery
(C) demonstrate the effectiveness of the DUMAND apparatus in detecting neutrinos
(D) name some cosmic phenomena that neutrino astronomy will illuminate
(E) contrast the motivation of earlier astronomers with that of the astrophysicists working on the DUMAND project

4. According to the passage, one advantage that neutrinos have for studies in astronomy is that they
(A) have been detected for the last twenty-five years
(B) possess a variable electric charge
(C) are usually extremely massive
(D) carry information about their history with them
(E) are very similar to other electromagnetic particles

5. According to the passage, the primary use of the apparatus mentioned in lines 24-32 would be to
(A) increase the mass of a neutrino
(B) interpret the information neutrinos carry with them
(C) study the internal structure of a neutrino
(D) see neutrinos in distant regions of space
(E) detect the presence of cosmic neutrinos

6. The passage states that interactions between neutrinos and other matter are
(A) rare
(B) artificial
(C) undetectable
(D) unpredictable
(E) hazardous

7. The passage mentions which of the following as a reason that neutrinos are hard to detect?
(A) Their pervasiveness in the universe
(B) Their ability to escape from different regions of space
(C) Their inability to penetrate dense matter
(D) The similarity of their structure to that of nucleons
(E) The infrequency of their interaction with other matter

8. According to the passage, the interaction of a neutrino with other matter can produce
(A) particles that are neutral and massive
(B) a form of radiation that permeates the universe
(C) inaccurate information about the site and circumstances of the neutrino’s production
(D) charged particles and light
(E) a situation in which light and other forms of electromagnetic radiation are blocked

9. According to the passage, one of the methods used to establish the properties of neutrinos was
(A) detection of photons
(B) observation of the interaction of neutrinos with gamma rays
(C) observation of neutrinos that were artificially created
(D) measurement of neutrinos that interacted with particles of seawater
(E) experiments with electromagnetic radiation

Lets Practice 3 RCs per day
I am posting one RC/day
if response is good, will post more
no OE in this passage.only OAs.
Even if i get one response I will post the OAs-promise
so friends
here you go
_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

Originally posted by nitya34 on 02 Mar 2009, 12:43.
Last edited by workout on 23 Aug 2018, 22:09, edited 4 times in total.
OA not Provided & improper formatting
VP
Joined: 05 Jul 2008
Posts: 1298
Re: Virtually everything astronomers known about objects  [#permalink]

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02 Mar 2009, 21:50
I am signing up. Just like the good old ad, am egg a day keeps the doctor away, 3 RC's a day gets you closer to the GMAT target.

Here is what I got.

I feel that passages as long as this one are atypical of GMAT.

How much time do you think is good enough for this passage?

Any ways, if this is LSAT stuff, its good to do because it makes GMAT RC easier.

B T W, I took a guess on Q 5, which had line numbers mentioned in Q and the Q did not have the appropriate lines underlined. I hope I am right on that.

B,C,A,D,E,A,E,D,C

I was really torn on the first Q and spent a lot of time. Nothing made sense to me. By POE I arrived at B.

Now lets get to the OA's/OE's and discussion.
Director
Joined: 04 Jan 2008
Posts: 781
Re: Virtually everything astronomers known about objects  [#permalink]

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02 Mar 2009, 22:09
Now since I know how the Real Qs look like ..promise you all that I will try to post GMAT-like RCs(theme wise-astronomy,archaeology,paleontology,World War II, Climate Change, paintings etc)
this one is not from LSAT category

Q 1 was most difficult to guess.I got 5/9 right.Poor I must say
I believe one can take 2 Mins/Qs..say 16-18 Mins for this 9 Q passage(becoz its not a tough passage)
with practice, we should bring done the time taken/passage
every 10-20 seconds we save will help us in CR/SC

will post the OAs soon
_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

VP
Joined: 18 May 2008
Posts: 1131
Re: Virtually everything astronomers known about objects  [#permalink]

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03 Mar 2009, 10:07
Nitya.....dat is a wonderful thing u hv started. I alw thought dat we adenough practice of SC and CR. but RC was rarely practiced.I hope now 3 RCs will be posted since u got the replies
Needless 2 say, +1 frm me

now my ans:
1 A
2 C
3 A
4 D
5 E
6 A
7 E
8 D
9 C
Director
Joined: 04 Jan 2008
Posts: 781
Re: Virtually everything astronomers known about objects  [#permalink]

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03 Mar 2009, 10:29
Thanks for kind words.
you got all
ACAD EAED C

posting the RC of 4 march soon

ritula wrote:
Nitya.....dat is a wonderful thing u hv started. I alw thought dat we adenough practice of SC and CR. but RC was rarely practiced.I hope now 3 RCs will be posted since u got the replies
Needless 2 say, +1 frm me

now my ans:
1 A
2 C
3 A
4 D
5 E
6 A
7 E
8 D
9 C

_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

VP
Joined: 05 Jul 2008
Posts: 1298
Re: Virtually everything astronomers known about objects  [#permalink]

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03 Mar 2009, 11:31
1 is A?

At the threshold of N A?

What does the word threshold mean here in this context? Long due?? Is that what it means?
Director
Joined: 04 Jan 2008
Posts: 781
Re: Virtually everything astronomers known about objects  [#permalink]

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03 Mar 2009, 19:18
I got it wrong too
Q1's ans is most confusing

if anyone can throw light

icandy wrote:
1 is A?

At the threshold of N A?

What does the word threshold mean here in this context? Long due?? Is that what it means?

_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

VP
Joined: 18 May 2008
Posts: 1131
Re: Virtually everything astronomers known about objects  [#permalink]

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03 Mar 2009, 22:21
Threshold means "The starting point for a new state or experience"

In the passage, it has been stated that scientists have proposed the concept of neutrinos. here is the line
"Fortunately, a group of astrophysicists has proposed a means of detecting cosmic neutrinos by harnessing the mass of the ocean"
Also the passage concludes with "Neutrino astronomy will doubtless bring its own share of surprises". Hence the name "At the threshold of N A" is most suitable.

icandy wrote:
1 is A?

At the threshold of N A?

What does the word threshold mean here in this context? Long due?? Is that what it means?
VP
Joined: 17 Jun 2008
Posts: 1443
Re: Virtually everything astronomers known about objects  [#permalink]

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03 Mar 2009, 23:08
By POE, I also had to choose from option A and B and finally chose option B. However, after seeing the OA, A does make sense.

The passage does not talk about History of universe with respect to Nutrino. In fact, it explains hos Nutrino Astronomy and expects surprises. Hence, an answer choice with "Nutrono Astronomy" will be the most correct answer. Here, between A and B, A contains this.
Intern
Joined: 23 Mar 2009
Posts: 13
Re: Virtually everything astronomers known about objects  [#permalink]

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15 Apr 2009, 10:05
Can any body tell why E is wrong in q3.
Intern
Joined: 30 Jul 2008
Posts: 32
Re: Virtually everything astronomers known about objects  [#permalink]

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12 May 2009, 13:36
my answers are:

1) C
2) C
3) E
4) D
5) E
6) A
7) E
8) D
9) C
Director
Joined: 01 Aug 2008
Posts: 584
Re: Virtually everything astronomers known about objects  [#permalink]

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25 Aug 2009, 05:21
I guess this one is easy .. took 11 mins.

1 a
2 d //wrong ...it's C I don't how I missed it..easy one
3 a
4 d
5 e
6 a
7 e
8 d
9 c

corrects : 8/9
Re: Virtually everything astronomers known about objects &nbs [#permalink] 25 Aug 2009, 05:21

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