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# The peaks of a mountain range, acting like rocks in a

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The peaks of a mountain range, acting like rocks in a [#permalink]

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06 Jul 2009, 19:50
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35% (medium)

Question Stats:

75% (01:42) correct 25% (01:40) wrong based on 28 sessions

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The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them: the resulting flow pattern, with crests and toughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

A) crests and toughs that remain stationary although the air that forms them is moving rapidly, are
B) crests and toughs that remain stationary although they are formed by rapidly moving air, are
C)crests and toughs that remain stationary although the air that forms them is moving rapidly, is
D)stationary crests and toughs although the air that forms them is moving rapidly, are
E)stationary crests and toughs although they are formed by rapidly moving air, is.

completly lost on the OG explanation.Can anybody throw some light in detail?
[Reveal] Spoiler: OA

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Last edited by Skywalker18 on 22 Apr 2017, 07:29, edited 1 time in total.
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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06 Jul 2009, 21:10
Two Subjects

Two S-V cases..hence between C&E

is it C?
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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07 Jul 2009, 09:06
MY pick is C as well as the wave can not form stationary crests....is refers to the air pattern
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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19 Jun 2010, 15:48
C for me as well
Earlier i thought of E as an option but I'm wrong (E chnages the meaning)
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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01 Aug 2012, 23:46
Can someone explain how 'C' differs from 'E' in terms of meaning?
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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02 Aug 2012, 07:12
Considering we are left with C and, E, in C, crests and toughs that remain stationary and he air that forms them- is more parallel than- stationary crests and toughs ….they are formed by -- So C is the one
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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02 Aug 2012, 08:34
Shoumik wrote:
Can someone explain how 'C' differs from 'E' in terms of meaning?

meaning of C: The air is moving rapidly yet the crests and toughs are still stationary.

meaning of E: The air is moving rapidly yet the stationary crests and toughs are formed.
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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17 Aug 2012, 03:00
C is the answer, resulting flow pattern(subject) is singular which matches singular form is
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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17 Aug 2012, 16:15
The subject here is "resulting flow pattern", which is singular. Therefore, the verb that comes after the modifying phrase, 'with crests...' must be is. Eliminate (A), (B), and (D).

Next, we have this awkward phrase in (E): 'stationary crests and troughs although...' The 'although' signals a contrast, but what exactly is being contrasted. With (C), we have crests and troughs that remain stationary.' Now there is a clear need for 'although', because we want to contrast the way that the crests and troughs move with the way that the air below them moves.

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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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17 Aug 2012, 16:27
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them: the resulting flow pattern, with crests and toughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

A) crests and toughs that remain stationary although the air that forms them is moving rapidly, are
B) crests and toughs that remain stationary although they are formed by rapidly moving air, are
C)crests and toughs that remain stationary although the air that forms them is moving rapidly, is
the "äir"is known as standing waves-correct
D)stationary crests and toughs although the air that forms them is moving rapidly, are
E)stationary crests and toughs although they are formed by rapidly moving air, is.
crests and toughs are not known as stationary waves-incorrect
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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17 Aug 2012, 17:11
1
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IMO:C
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them: the resulting flow pattern(Singular subject), with crests and toughs that remain stationary although the air that forms them is moving rapidly, are (plural verb for singular subject) known as "standing waves."

A) crests and toughs that remain stationary although the air that forms them is moving rapidly, are :wrong
B) crests and toughs that remain stationary although they are formed by rapidly moving air, are:Wrong
C)crests and toughs that remain stationary although the air that forms them is moving rapidly, is :Right (preserved the original intended meaning of the sentence)
D)stationary crests and toughs although the air that forms them is moving rapidly, areWrong
E)stationary crests and toughs although they( refer to singular subject "the resulting flow pattern") are formed by rapidly moving air, is. wrong (meaning changed completely )
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Re: The peaks of a mountain range, acting like rocks in a   [#permalink] 17 Aug 2012, 17:11
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