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Nuclear fusion is the force that powers the Sun, the stars, and

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Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

(A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors

(B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors

(C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do

(D) and merges the nuclei of atoms but does not split them apart, as is done in nuclear reactors

(E) and merges the nuclei of atoms, unlike atomic reactors that split them apart


The Official Guide for GMAT Review, 11th Edition, 2005

Practice Question
Question No.: SC 104
Page: 654

Originally posted by iced_tea on 30 May 2006, 09:26.
Last edited by Bunuel on 20 Aug 2019, 06:30, edited 3 times in total.
Edited the question.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post Updated on: 26 Jun 2019, 09:15
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Bishal123456789 wrote:
AjiteshArun VeritasPrepErika Among option A, B, and C, what is wrong with A and B and what does "do" refer to in C?

Alright, this is kind of a weird one that 1) is easiest to solve if you know the basics of how nuclear reactors work and 2) gets into the weeds of some comparison grammar rules.

The sentence is trying to convey, in essence, that nuclear fusion merges atomic nuclei, whereas nuclear reactors use a process that splits atomic nuclei.

(A) Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

In this answer choice, "and not" doesn't do a very good job creating the contrast we want to see — we're trying to contrast merging vs. splitting atomic nuclei, but all this sentence says is that nuclear fusion both 1) merges the nuclei and 2) doesn't split them. So this doesn't capture the intended meaning of the sentence.

A lot of folks in here are eliminating this one because "as" most commonly compares two verbs, and "in nuclear reactors" isn't a verb. HOWEVER, "as" can also be used to compare adverbs/adverbial phrases. "In nuclear reactors" is an adverbial phrase, so this is good to go. That said, there is no other adverbial phrase for "in nuclear reactors" to be parallel to, which ideally there would be.

(B) Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms instead of splitting them apart, like nuclear reactors.

This answer choice nicely uses "instead of" to contrast "merging" and "splitting". This is fine.

Here we use "like", which is used to compare two nouns. "Nuclear reactors" is a noun, but what noun are we comparing it to? Are "nuclear reactors" like "nuclear fusion"? Are they like "the Sun, the stars, and hydrogen bombs"? No! In fact, they're very different from them, as they're doing basically the opposite process (splitting instead of merging). There's no noun to logically compare "nuclear reactors" to and keep the meaning of the sentence intact.

(C) Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do.

Similar to answer choice B, this answer choice uses "rather than" to contrast "merging" and "splitting". This is also fine.

Here we use "as" to compare two verbs: "splitting" and "do". "Do" implies the verb "split", so the comparison really conveys "... splitting them apart, as nuclear reactors do [split them apart]".

In most cases, the implied verb after helper verbs like "to be" (is, are, was, were, will be, have been, etc.) and "to do" (does, do, did, will do, have done, etc.) should be in a form that already exists in the sentence (e.g. "... splits atomic nuclei, as nuclear reactors do [split]" or "... splitting atomic nuclei, as nuclear reactors are [splitting]"). But it isn't strictly necessary. So this is fine, even if it isn't the absolute clearest and most parallel way to get the point across. If we had an answer where the implied verb mirrored an existing verb, it would be a better choice, provided all of the other meaning and grammar issues were correctly resolved.

Overall, this question is really rough, and I frankly wouldn't agonize over it. In most problems, you should be able to suss out intended meaning even if you don't remember much from high school physics/haven't recently watched Chernobyl. Similarly, comparisons will usually be more exactly parallel in correct answers.

Let me know if you want me to break down answer choices D and E as well.

Originally posted by VeritasPrepErika on 26 Jun 2019, 09:06.
Last edited by VeritasPrepErika on 26 Jun 2019, 09:15, edited 2 times in total.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 30 May 2006, 21:51
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'and merges' incorrectly lumps the merging of the nuclei as an item that nuclear fusion powrs. -> D,E are out.

A,B --> bad comparison. Need a 'do' at the back

C is the best choice.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 17 Sep 2006, 09:35
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C.

The sentence would look like this if you insert E

Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, and merges the nuclei of atoms, unlike atomic reactors that split them apart

unlike - compares Nuclear fusion with atomic reactors, not correct. if it was something like unlike nuclear fission, it would have been correct.

also think usage of 'and' confusing and changes the meaning of the sentence. Sun, stars and hydrogen bombs are the examples which are powered by nuclear fusion, where as merging of nuclei atoms is more like a definition of nuclear fusion.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 21 Sep 2006, 12:03
iced_tea wrote:
Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors.

C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do.

D) and merges the nuclei of atoms but does not split them apart, as is done in nuclear reactors.

E) and merges the nuclei of atoms, unlike atomic reactors that split them apart.


The biggest problem with E is that it compares Nuclear Fusion with Atomic Reactors?

Very late. But C it is.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 17 Oct 2006, 21:16
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The answer is C.
D and E get eliminated(and merges...) since it talks about Nuclear Fusion's another property ( and merges the nuclei of atoms ....), whereas it actually needs to mean the modus operandi of the Nuclear fusion, which is ok in A,B,C (merging). And out of those 3, C is the complete comparison.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 01 Feb 2008, 16:41
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paddyboy wrote:
iced_tea wrote:
Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors.

C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do.

D) and merges the nuclei of atoms but does not split them apart, as is done in nuclear reactors.

E) and merges the nuclei of atoms, unlike atomic reactors that split them apart.


The biggest problem with E is that it compares Nuclear Fusion with Atomic Reactors?

Very late. But C it is.



The trick here is to notice that the listed nouns ends with "AND hydrogen bombs." When this un-underlined portion ends like that, you should know certainly that what comes in the underlined sentence shouldn't be a list anymore, therefore you can eliminate D and E instantely. You know that what will start after the comma will be a present participle. This should do the trick.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 27 Apr 2010, 07:42
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Quote:
Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors.

C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do.

D) and merges the nuclei of atoms but does not split them apart, as is done in nuclear reactors.

E) and merges the nuclei of atoms, unlike atomic reactors that split them apart.


Just read it like this "Nuclear fusion is the force that powers the Sun and merges the nuclei of atoms, unlike atomic reactors that split them apart" Think are they two separate actions? NO.

Now
"Nuclear fusion is the force that powers the Sun, merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do." This explains that Nuclear fusion is the force that power the Sun by merging the nuclei. Makes more sense.

So it is "C"
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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I go with the OG’s OA and OE, simply because they are official ones. But the essence of the passage seems to be to compare nuclear fusion, a phenomenon, with nuclear reactor, just a device or shall we say, a chamber. The phenomenon rightly comparable to fusion is actually fission.

GMAT has highlighted that we shouldn’t compare apples with oranges. Isn’t it ironical that now a reaction is sought to be compared with a reactor.

The bottom line is that with LOL for OG, C is the answer.
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Originally posted by daagh on 04 Nov 2010, 13:27.
Last edited by daagh on 09 Feb 2019, 00:26, edited 1 time in total.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 24 Apr 2018, 02:57
iced_tea wrote:
The Official Guide for GMAT Review, 11th Edition, 2005

Practice Question
Question No.: SC 104
Page: 654

Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

(A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors

(B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors

(C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do

(D) and merges the nuclei of atoms but does not split them apart, as is done in nuclear reactors

(E) and merges the nuclei of atoms, unlike atomic reactors that split them apart


dont by obsessed with grammar, instead focus on meaning. i fail gmat again and now i try to apply e gmat approach.

look at choice a.
" as in nuclear reactors " mean as "nuclear fusion split in nuclear reactor" . this make no sense.
we have to know illogic thing and intended meaning when we read only original choice
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 09 May 2018, 03:56
C is correct

We need "merging" here as it the result of force is merging the nuclei

as nuclear reactors do
Correctly states the action done by nuclear reactors so "do" is essential here

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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

(A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors

(B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors

(C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do

(D) and merges the nuclei of atoms but does not split them apart, as is done in nuclear reactors

(E) and merges the nuclei of atoms, unlike atomic reactors that split them apart

The focus of the topic is the nuclear fusion that powers the vast bodies. The adverbial modifier precisely refers to the power, which merges the nuclei. The first modification ends there, and then in the second modification, the relative clause 'as nuclear reactors do' modifies the splitting of the atoms by the fabricated reactors.
The choice also uses. The correct idiom rather than compared to the 'instead of.'
E's problem stems from wrongly treating 'merger' as equal to powers although 'merger' is only the result of the 'powering,' which entails a modifier.

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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 26 Sep 2018, 16:26
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Hi daagh,
My understanding was 'rather than' is always used to show preference and instead of means in place of and does not show preference ?
If my understanding is correct, isnt instead of more suitable here?
Please advise

Thanks in Advance
Siddharth

daagh wrote:
Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

(A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors

(B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors

(C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do

(D) and merges the nuclei of atoms but does not split them apart, as is done in nuclear reactors

(E) and merges the nuclei of atoms, unlike atomic reactors that split them apart

The focus of the topic is the nuclear fusion that powers the vast bodies. The adverbial modifier precisely refers to the power, which merges the nuclei. The first modification ends there, and then in the second modification, the relative clause 'as nuclear reactors do' modifies the splitting of the atoms by the fabricated reactors.
The choice also uses. The correct idiom rather than compared to the 'instead of.'
E's problem stems from wrongly treating 'merger' as equal to powers although 'merger' is only the result of the 'powering,' which entails a modifier.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 27 Sep 2018, 07:32
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One possible reason is that the choice wants to assert and contrast the superiority of 'merging' over 'splitting' as merging is a mega event etc. while splitting is not( comparatively)
You see, when we use one in the place of another, they should be truly interchangeable. Here can we replace 'fusion' in the place of 'fission'? Not.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 02 Feb 2019, 21:35
daagh
Can we reject D on the basis that the clause after as is in passive construction so it can't be parallel to clause before as
Is there anything wrong in my reasoning or can we have them as parallel
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 02 Feb 2019, 22:39
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If you want to go by parallelism, then there must be a parallelism marker such as one of the fanboys. Here 'as' is only a comparison marker.

But generally, it is true that active and passive voice combinations are not favored combis when compared to same voice combis.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 09 Feb 2019, 00:17
the key point is to realize that merging is not separate from power. this is hard point. we use our common sense of this world to realize this meaning point . we do need to understand a little bit of physics to realize this meaning point. we need a good general knowledge to solve this point.

in many questions, gmat challenge us to realize wheather two actions, one represented by a verb with tense, other represented by doing, are not separate. this point is basic and hard. whenever we see doing, ask ourself, wether the two actions are not separate.
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 26 Jun 2019, 02:40
AjiteshArun VeritasPrepErika Among option A, B, and C, what is wrong with A and B and what does "do" refer to in C?
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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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Re: Nuclear fusion is the force that powers the Sun, the stars, and  [#permalink]

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New post 22 Aug 2019, 21:28
"instead of" can not be used to connect two similar things. it is a preposition not a conjunction. og2020 offers a question testing this point.
"instead of" in B is wrong
rather than is conjunction, which is used to connect 2 similar things
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Re: Nuclear fusion is the force that powers the Sun, the stars, and   [#permalink] 22 Aug 2019, 21:28

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