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The size of oceanic waves is a function of the velocity of the wind an

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The size of oceanic waves is a function of the velocity of the wind an  [#permalink]

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New post 15 Feb 2019, 03:33
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The size of oceanic waves is a function of the velocity of the wind and of fetch, the length of the surface of the water subject to those winds. The impact of waves against a coastline is a function of the size of the waves and the shape of the sea bottom. The degree of erosion to which a coastline is subject is a function of the average impact of waves and the geologic composition of the coastline.

If these statements are true, which one of the following must also be true?


(A) The degree of erosion to which a coastline is subject is related to the shape of the sea bottom.

(B) The size of oceanic waves will not fluctuate far from an average for any given stretch of ocean.

(C) The fetch of winds is related to the shape of the sea bottom.

(D) The size of oceanic waves is related to the shape of the sea bottom.

(E) The average velocity of the wind in an area plays no role in the degree of erosion to which a coastline is subject.

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Re: The size of oceanic waves is a function of the velocity of the wind an  [#permalink]

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New post 16 Feb 2019, 05:03
VeritasKarishma chetan2u daagh ; could anyone please share on why option A is correct here?
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Re: The size of oceanic waves is a function of the velocity of the wind an  [#permalink]

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New post 16 Feb 2019, 11:33
Archit3110 wrote:
could anyone please share on why option A is correct here?



Hey Archit3110

As per the argument,

Representing the data as mathematical functions:

Impact of the waves = f(size of the waves and the shape of the sea bottom)

degree of erosion = f(average impact of waves) = f(f(size of the waves and the shape of the sea bottom))

So we can say degree of erosion is related to shape of sea bottom.

Hope this helps!

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Re: The size of oceanic waves is a function of the velocity of the wind an  [#permalink]

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New post 27 Feb 2019, 03:02
Bunuel wrote:
The size of oceanic waves is a function of the velocity of the wind and of fetch, the length of the surface of the water subject to those winds. The impact of waves against a coastline is a function of the size of the waves and the shape of the sea bottom. The degree of erosion to which a coastline is subject is a function of the average impact of waves and the geologic composition of the coastline.

If these statements are true, which one of the following must also be true?


(A) The degree of erosion to which a coastline is subject is related to the shape of the sea bottom.

(B) The size of oceanic waves will not fluctuate far from an average for any given stretch of ocean.

(C) The fetch of winds is related to the shape of the sea bottom.

(D) The size of oceanic waves is related to the shape of the sea bottom.

(E) The average velocity of the wind in an area plays no role in the degree of erosion to which a coastline is subject.


OFFICIAL EXPLANATION:



A. The degree of erosion to which a coastline is subject is related to the shape of the sea bottom.

Choice (A) makes sense because the impact of waves is related to the shape of the sea bottom, and the coast’s erosion is related to the impact of waves. Choice (B) is wrong because the statements only state the factors (wind velocity and fetch) that influence wave size; there’s nothing to suggest that wave size stays close to an average. Choice (C) doesn’t work; if fetch is the length of the surface of the water, it shouldn’t be related to the shape of the sea bottom. Choice (D) is wrong because the size of waves comes from wind and fetch, not the shape of the bottom. Choice (E) looks wrong, too. Wind velocity creates size of waves, size of waves affects impact, and impact affects erosion, so average velocity of wind playing no role in erosion doesn’t make sense. Choice (A) is the best answer.
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Re: The size of oceanic waves is a function of the velocity of the wind an  [#permalink]

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New post 29 Apr 2019, 16:25
I felt that using a mathematical approach helps here.

Simply put, I put all the sentences into mathemetical terms.

Length X Velocity X Wind --> Size/Wave X Shape Sea Bottom --> Impact

Impact X Geo Composition --> Erosion

Using this map, we see that only A applies.
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Re: The size of oceanic waves is a function of the velocity of the wind an   [#permalink] 29 Apr 2019, 16:25
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