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Newton's theory of universal gravitation states that every
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07 Sep 2023, 07:49
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Newton's theory of universal gravitation states that every massive particle in the universe attracts every other massive particle with a force proportional to the mass of the particles and their proximity to one another. Consequently, cosmologists would expect that calculations based on this theory would yield an accurate measure of the mass in the universe; in fact, though, the total amount of observable matter in the universe does not contain enough mass to account for the organization of the universe into clusters of galaxies. To explain this discrepancy, cosmologists have developed the theory of "dark matter:" they postulate that the missing mass consists of elementary particles too small to be detected by electromagnetic radiation, and that these particles provide the mass necessary to hold the universe together. According to available evidence, these particles can only account for a maximum of 20 percent of the missing mass in the universe, yet their existence brings us one important step closer to solving the mystery of the missing matter.
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80% (02:04) correct
20% (02:10) wrong based on 51 sessions
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According to the passage, which of the following factors is believed to help account for the missing mass in the universe?
A. Massive particles with a force proportional to the mass of the particles attract additional mass to the universe. B. Tiny particles that are not currently observable by humans compose some of the missing mass. C. "Dark matter" adheres to mass and causes it to expand. G D. alaxies organize themselves into clusters to compensate for the lack of other mass in the universe. E. The proximity of certain particles to each other forces an attraction that creates mass.
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For the following question, consider each of the choices separately and select all that apply
The passage suggests that a massive particle would be most likely to attract another particle
❑ with a force related to the mass of each particle. ❑ at a distance related to the mass of each particle. ❑ by using an elementary particle as an intermediary.
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Which one of the following statements, if true, would most weaken the argument?
A. While Country B has a regional airport, Country A has an international airport. B. Country As newly elected government raised taxes with the goal of guaranteeing a more just distribution of wealth. C. The type of coal always burned in Country A is different from the type of coal always burned in Country B. D. Both Country A and Country B have been in a recession. E. Agricultural production is also falling in Country A.
Newton's theory of universal gravitation states that every
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29 Mar 2024, 15:18
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EXPLANATION QUESTION #1
According to the passage, cosmologists believe that the missing mass is partially accounted for by elementary particles too small to be detected by electromagnetic radiation. Choice (B) rephrases this statement, and so it's the best response. Choices (A) and (E) recycle words from the first sentence of the passage, but they have different meanings; moreover, the first sentence is referring to the problem the cosmologists are trying to solve, whereas the question asks for the solution. Choice (C) is wrong because the passage doesn't say anything about dark matter causing the expansion. Choice (D) also doesn't work: The galaxies are the evidence that shows that Newton's theory has a problem, not the solution.
Newton's theory of universal gravitation states that every
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29 Mar 2024, 15:19
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EXPLANATION QUESTION #2
Newton's theory states that massive particles attract each other with a force proportional to the mass of the particles and their proximity to one another, so the strength with which the particles attract each other is related to their mass and the distance between them. Choice (B) is tempting, but incorrect: It relates distance and massto each other, when it needs to relate them both to force. Choice (C) is also incorrect, because it uses the idea of elementary particles presented later in the passage out of context-the passage doesn't say that these particles are used as intermediaries between massive particles. Choice (A) is supported by the passage: It forms a relationship between force and mass, which is one of the relationships contained in the theory.
Re: Newton's theory of universal gravitation states that every
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29 Mar 2024, 15:22
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EXPLANATION QUESTION #3
This argument contains one of GRE's favorite flaw patterns: The author makes a comparison between Country A and Country B and assumes that those two countries are the same in all relevant respects. Any time you see a comparison flaw, the answer will address whether the comparison is a fair one; in this weaken question, the answer must show that the countries are different in a relevant respect. Choice (C) does so: If the types of coal that the two countries use always differ, it is possible that the regulations on emissions have a negative effect on Country A's industrial production but not on Country B's industrial production. While (A) also provides a difference between the two countries, the link connecting the type of airport, the regulations, and industrial production is less strong than that connecting coal, the regulations, and industrial production in (C). Choices (B)and (E) do not establish any difference between the two countries. Choice (D)establishes a similarity between the countries and so does not help explain the differences in industrial production.
gmatclubot
Re: Newton's theory of universal gravitation states that every [#permalink]
07 Sep 2023, 07:49
80% (02:04) correct
