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# Ocean waves

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Retired Moderator
Status: Getting strong now, I'm so strong now!!!
Affiliations: National Institute of Technology, Durgapur
Joined: 04 Jun 2013
Posts: 543
Location: India
GPA: 3.32
WE: Information Technology (Computer Software)

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24 May 2015, 00:24
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Difficulty:

25% (medium)

Question Stats:

74% (01:09) correct 26% (01:23) wrong based on 412 sessions

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"Ocean waves are actually a circular movement of the water both above and below the surface. Boaters and swimmers see and feel the portion of the wave that is above the surface. As long as the wave is in the deep ocean it will usually not fall in on itself, known as “breaking.” When the bottom of the ocean becomes shallower - specifically when the depth of the water is less than 1.3 times the height of the wave - the wave will break. This occurs because the circular motion of the wave below the water cannot continue and the portion of the wave above the surface builds up until it collapses.

If the statements above are true, which of the following can be inferred?

A) Waves occurring in the deeper parts of the ocean are not dangerous because they usually do not break.

B) Shallow water is the only mechanism that causes waves to break.

C) Swimmers and boaters should avoid areas where waves are breaking.

D) It may be possible to estimate the depth of shallow ocean waters based on the height of breaking waves.

E) Waves occurring in freshwater lakes do not reach the same height as waves in the ocean.
[Reveal] Spoiler: OA

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Director
Joined: 21 May 2013
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24 May 2015, 02:09
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WaterFlowsUp wrote:
"Ocean waves are actually a circular movement of the water both above and below the surface. Boaters and swimmers see and feel the portion of the wave that is above the surface. As long as the wave is in the deep ocean it will usually not fall in on itself, known as “breaking.” When the bottom of the ocean becomes shallower - specifically when the depth of the water is less than 1.3 times the height of the wave - the wave will break. This occurs because the circular motion of the wave below the water cannot continue and the portion of the wave above the surface builds up until it collapses.

If the statements above are true, which of the following can be inferred?

A) Waves occurring in the deeper parts of the ocean are not dangerous because they usually do not break.

B) Shallow water is the only mechanism that causes waves to break.

C) Swimmers and boaters should avoid areas where waves are breaking.

D) It may be possible to estimate the depth of shallow ocean waters based on the height of breaking waves.

E) Waves occurring in freshwater lakes do not reach the same height as waves in the ocean.

+1 for D. Line highlighted mentions that depth of shallow waters can be estimated based on the height of breaking waves.
Manager
Joined: 21 Mar 2014
Posts: 59
Location: India
Concentration: Strategy, Technology

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24 May 2015, 05:42
IMO D- rest all options are all wayward and cannot be inferred from the argument. Choice D appropriately states that the depth of shallow ocean waters can be estimated
Director
Joined: 24 Nov 2015
Posts: 582
Location: United States (LA)

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08 Jun 2016, 12:42
options A,C and E are out of scope or irrelevant options
the use of word ' only ' makes option B incorrect
fom the following statement ' When the bottom of the ocean becomes shallower - specifically when the depth of the water is less than 1.3 times the height of the wave - the wave will break. ' we can can estimate the depth of shallow water
Intern
Joined: 20 Sep 2015
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05 Sep 2017, 23:36
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In this Inference question, the correct answer must be true, while incorrect answers could be false.

Choice A could be false because the stimulus never discusses the danger posed by deep ocean waves.

Choice B also goes beyond what is discussed in the stimulus; the stimulus indicates shallow water is one cause of waves breaking but maybe not necessarily the only cause.

Choice C uses the word “should” which is usually an indicator of reaching beyond what must be true. The stimulus does not say anything about what portions of the ocean should be avoided.

Choice D is the correct answer as the stimulus provides ample reasons why it may be possible to estimate the depth of water based on the height of breaking waves.

Choice E also goes beyond the stimulus by bringing freshwater lakes into the discussion. It may certainly be true that waves on lakes are not as big as those in the ocean, but this may also be false precisely because it is not discussed by the stimulus.
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Concentration: Operations, Marketing
GMAT 1: 670 Q48 V36
GRE 1: 314 Q157 V157
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06 Sep 2017, 00:44
A ,C and E are irrelevant to the argument .
There is a choice between B and D
While there is a case for B but the argument does not have sufficient information to infer B .
We are just told that breaking happens in shallow water .
The can be other reasons for breaking .
D on the other is absolutely correct we can estimate the depth of the shallow waters

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Re: Ocean waves   [#permalink] 06 Sep 2017, 00:44
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