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The tidal range at a particular location is the difference in height

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The tidal range at a particular location is the difference in height  [#permalink]

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New post 16 Jul 2018, 07:23
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  45% (medium)

Question Stats:

63% (01:48) correct 38% (01:53) wrong based on 80 sessions

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The tidal range at a particular location is the difference in height between high tide and low tide. Tidal studies have shown that one of the greatest tidal ranges in the world is found in the Bay of Fundy and reaches more than seventeen meters. Since the only forces involved in inducing the tides are the sun’s and moon’s gravity, the magnitudes of tidal ranges also must be explained entirely by gravitational forces.

Which one of the following most accurately describes a flaw in the reasoning above?

(A) It gives only one example of a tidal range
(B) It fails to consider that the size of a tidal range could be affected by the conditions in which gravitational forces act
(C) It does not consider the possibility that low tides are measured in a different way than are hightides
(D) It presumes, without providing warrant, that most activity within the world’s oceans is a result of an interplay of gravitational forces
(E) It does not differentiate between the tidal effect of the sun and the tidal effect of the moon

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The tidal range at a particular location is the difference in height  [#permalink]

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New post 16 Jul 2018, 08:36
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nightblade354 wrote:
The tidal range at a particular location is the difference in height between high tide and low tide. Tidal studies have shown that one of the greatest tidal ranges in the world is found in the Bay of Fundy and reaches more than seventeen meters. Since the only forces involved in inducing the tides are the sun’s and moon’s gravity, the magnitudes of tidal ranges also must be explained entirely by gravitational forces.

Which one of the following most accurately describes a flaw in the reasoning above?

(A) It gives only one example of a tidal range
(B) It fails to consider that the size of a tidal range could be affected by the conditions in which gravitational forces act
(C) It does not consider the possibility that low tides are measured in a different way than are hightides
(D) It presumes, without providing warrant, that most activity within the world’s oceans is a result of an interplay of gravitational forces
(E) It does not differentiate between the tidal effect of the sun and the tidal effect of the moon

Source: LSAT and CR Archive


Option A: Incorrect : This is more a neutral statement. It does not contribute much to our concern- how the magnitude of the tidal range can be explained.

Option B: Correct : The BOF has unusually high TR. But the TR is dependent on Sun & Moon's GravF. But is there any factors geological, seasonal, weather , and/or environmental at the area of BOF, that contribute to the higher TR ? This option directly points to that possibility.

Option C: Incorrect : The way of measuring of tides is not the concern of the passage. We are rather interested in the measured value of those and the difference of those values constitute the value of tidal range( our main concern)

Option D: Incorrect : Oceans activity is a information that is brought from outside ( not related to passage)

Option E: Incorrect : The difference in tidal effect of sun & moon will not have difference in the tidal range as a whole . [/quote]
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Re: The tidal range at a particular location is the difference in height  [#permalink]

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New post 16 Jul 2018, 08:38
Reasoning: gravity is the ONLY force which is responsible for tides. This doesn’t imply that they explain EVERYTHING about tides. <- This is the flaw in the reasoning. It ignores other factors such as wind, climate change, etc.

Answer: B
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Re: The tidal range at a particular location is the difference in height &nbs [#permalink] 16 Jul 2018, 08:38
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