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Suppose we were in a spaceship in free fall, where objects are weightl

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Suppose we were in a spaceship in free fall, where objects are weightl [#permalink]

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New post 22 Aug 2015, 06:20
Question 1
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E

Question Stats:

88% (01:32) correct 12% (01:21) wrong based on 212

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Question 2
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A
B
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E

Question Stats:

88% (00:27) correct 12% (00:47) wrong based on 204

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Question 3
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Question Stats:

50% (00:41) correct 50% (00:35) wrong based on 210

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Question 4
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Question Stats:

71% (01:01) correct 30% (01:04) wrong based on 200

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Suppose we were in a spaceship in free fall, where objects are weightless, and wanted to know a small solid object’s mass. We could not simply balance that object against another of known weight, as we would on Earth. The unknown mass could be determined, however, by placing the object on a spring scale and swinging the scale in a circle at the end of a string. The scale would measure the tension in the [gl]string[/gl], which would depend on both the speed of revolution and the mass of the object. The tension would be greater, the greater the mass or the greater the speed of revolution. From the measured tension and speed of whirling, we could determine the object’s mass.

Astronomers use an analogous procedure to “weigh” double-star systems. The speed with which the two stars in a double-star system circle one another depends on the gravitational force between them, which holds the system together. This attractive force, analogous to the tension in the string, is proportional to the stars’ combined mass, according to Newton’s law of gravitation. By observing the time required for the stars to circle each other (the period) and measuring the distance between them, we can deduce the restraining force, and hence the masses.



Q1 :- It can be inferred from the passage that the two procedures described in the passage have which of the following in common?
A They have been applied in practice.
B They rely on the use of a device that measures tension.
C Their purpose is to determine an unknown mass.
D They can only be applied to small solid objects.
E They involve attraction between objects of similar mass.

[Reveal] Spoiler:
C



Q2 :- According to the passage, the tension in the string mentioned in highlight text is analogous to which of the following aspects of a double-star system?
A The speed with which one star orbits the other
B The gravitational attraction between the stars
C The amount of time it takes for the stars to circle one another
D The distance between the two stars
E The combined mass of the two stars

[Reveal] Spoiler:
B



Q3 :- Which of the following best describes the relationship between the first and the second paragraph of the passage?
A The first paragraph provides an illustration useful for understanding a procedure described in the second paragraph.
B The first paragraph describes a hypothetical situation whose plausibility is tested in the second paragraph.
C The first paragraph evaluates the usefulness of a procedure whose application is described further in the second paragraph.
D The second paragraph provides evidence to support a claim made in the first paragraph.
E The second paragraph analyzes the practical implications of a methodology proposed in the first paragraph.

[Reveal] Spoiler:
A


Q4 :- The author of the passage mentions observations regarding the period of a double-star system as being useful for determining
A the distance between the two stars in the system
B the time it takes for each star to rotate on its axis
C the size of the orbit the system’s two stars occupy
D the degree of gravitational attraction between the system’s stars
E the speed at which the star system moves through space

[Reveal] Spoiler:
D

[Reveal] Spoiler: Question #1 OA
[Reveal] Spoiler: Question #2 OA
[Reveal] Spoiler: Question #3 OA
[Reveal] Spoiler: Question #4 OA

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Kudos [?]: 618 [0], given: 606

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Re: Suppose we were in a spaceship in free fall, where objects are weightl [#permalink]

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New post 24 Aug 2015, 01:57
This was a easy passage. I guess it aint that easy on the gmat.. 1 week more.. RC giving issues.. any pointer. Jarvis

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Re: Suppose we were in a spaceship in free fall, where objects are weightl [#permalink]

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New post 29 May 2016, 05:35
C B A D Fairly easy passage :) , all correct in 5 mins 15 seconds
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Kudos [?]: 945 [0], given: 72

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Re: Suppose we were in a spaceship in free fall, where objects are weightl [#permalink]

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New post 09 Jun 2016, 00:26
Top Contributor
Easy passage: 5 mins all correct. Took 2 mins for para and ~1.5 mins for last 2 questions.
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Re: Suppose we were in a spaceship in free fall, where objects are weightl [#permalink]

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New post 15 Sep 2017, 11:47
Fairly easy passage.
I was expecting it to be <600 (sub 600) level. 8-)
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Re: Suppose we were in a spaceship in free fall, where objects are weightl [#permalink]

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New post 26 Sep 2017, 01:18
Hello Experts,

Q3 :- Which of the following best describes the relationship between the first and the second paragraph of the passage?
A The first paragraph provides an illustration useful for understanding a procedure described in the second paragraph.
B The first paragraph describes a hypothetical situation whose plausibility is tested in the second paragraph.
C The first paragraph evaluates the usefulness of a procedure whose application is described further in the second paragraph.
D The second paragraph provides evidence to support a claim made in the first paragraph.
E The second paragraph analyzes the practical implications of a methodology proposed in the first paragraph.

I was torn between A and C. I eventually selected A because C says the the first para evaluates the usefulness of a procedure. The author doesn't do that Eg: - The author doesn't say the procedure is useful here but can't be used there. He/she just describes a procedure

Hence I eliminated C

I would like to hear your thoughts as to how you eliminated option C in this question. Thanks :-)

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Re: Suppose we were in a spaceship in free fall, where objects are weightl   [#permalink] 26 Sep 2017, 01:18
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Suppose we were in a spaceship in free fall, where objects are weightl

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