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The consensus among astronomers, based upon observations of the

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nightblade354
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The consensus among astronomers, based upon observations of the [#permalink] New post   10 Aug 2019, 17:45
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The consensus among astronomers, based upon observations of the surface of pulsars, is that pulsars are spinning ball of neutrons compressed into a sphere some 10 kilometers in diameter with a mass roughly equal to that of our sun. However, their observed properties are also consistent with some pulsars actually being filled with quarks, the building blocks of neutrons. Because the core of a quark-filled pulsar, unlike a neutron-filled one, would have an overall positive charge, it would attract a layer of negatively charged particles that could support a crust of neutrons.

The statement that the core of a quark-filled pulsar would have an overall positive charge plays which one of the following roles in the argument above?

(A) It helps explain how pulsars could have neutrons on their surface even if they were not entirely made up of neutrons

(B) It forms part of a challenge to the claim that some pulsars may be made up of quarks

(C) It helps explain why some pulsars would not be readily recognized as such by astronomers

(D) It presents a new finding that challenges the consensus view of the structure of pulsars

(E) It points out a problem with the view that pulsars have a mass roughly equal to that of our sun
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The consensus among astronomers, based upon observations of the [#permalink] New post   21 Oct 2019, 13:37
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The consensus among astronomers, based upon observations of the surface of pulsars, is that pulsars are spinning ball of neutrons compressed into a sphere some 10 kilometers in diameter with a mass roughly equal to that of our sun. However, their observed properties are also consistent with some pulsars actually being filled with quarks, the building blocks of neutrons. Because the core of a quark-filled pulsar, unlike a neutron-filled one, would have an overall positive charge, it would attract a layer of negatively charged particles that could support a crust of neutrons.

The statement that the core of a quark-filled pulsar would have an overall positive charge plays which one of the following roles in the argument above?

(A) It helps explain how pulsars could have neutrons on their surface even if they were not entirely made up of neutrons

(B) It forms part of a challenge to the claim that some pulsars may be made up of quarks

(C) It helps explain why some pulsars would not be readily recognized as such by astronomers

(D) It presents a new finding that challenges the consensus view of the structure of pulsars

(E) It points out a problem with the view that pulsars have a mass roughly equal to that of our sun


The answer lies in the last sentence : it would attract a layer of negatively charged particles that could support a crust of neutrons
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Re: The consensus among astronomers, based upon observations of the [#permalink] New post   24 Jun 2021, 19:35
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The consensus among astronomers, based upon observations of the surface of pulsars, is that pulsars are spinning ball of neutrons compressed into a sphere some 10 kilometers in diameter with a mass roughly equal to that of our sun. However, their observed properties are also consistent with some pulsars actually being filled with quarks, the building blocks of neutrons. Because the core of a quark-filled pulsar, unlike a neutron-filled one, would have an overall positive charge, it would attract a layer of negatively charged particles that could support a crust of neutrons.

The statement that the core of a quark-filled pulsar would have an overall positive charge plays which one of the following roles in the argument above?

(A) It helps explain how pulsars could have neutrons on their surface even if they were not entirely made up of neutrons.
Yeah, As in the argument it tries to provide an explanation.

Because the core of a quark-filled pulsar, unlike a neutron-filled one, would have an overall positive charge, it would attract a layer of negatively charged particles that could support a crust of neutrons.


(B) It forms part of a challenge to the claim that some pulsars may be made up of quarks Although this fact is true that's not the role it plays.

(C) It helps explain why some pulsars would not be readily recognized as such by astronomers Nerver mentioned in the argument

(D) It presents a new finding that challenges the consensus view of the structure of pulsars Although this fact is true that's not the role

(E) It points out a problem with the view that pulsars have a mass roughly equal to that of our sun Irrelavent
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Re: The consensus among astronomers, based upon observations of the [#permalink] New post   20 Jul 2021, 02:59
A) It helps explain how pulsars could have neutrons on their surface even if they were not entirely made up of neutrons
[color=#ed1c24]This can be possible reason and stated in the passage let us hang onto it [/color]

(B) It forms part of a challenge to the claim that some pulsars may be made up of quarks
no there were no challenges assosciated with the pulsars as stated from the passage

(C) It helps explain why some pulsars would not be readily recognized as such by astronomers
Here too there were no hindrance in the researches not able to find out the cause of the properties of the pulsars

(D) It presents a new finding that challenges the consensus view of the structure of pulsars
These were in accordance with the properties pen down by the researchers

(E) It points out a problem with the view that pulsars have a mass roughly equal to that of our sun
This a out of context problem cited
Hence IMO A
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Re: The consensus among astronomers, based upon observations of the [#permalink] New post   24 Mar 2024, 03:01
Hi, could somebody please explain why D is not the correct answer. As per my understanding, the astronomers agree upon the pulsars being spinning balls of neutrons compressed into a sphere.
Now the 'however' in the following statement as well as the bold-faced statement tries to bring forth the point that the pulsars may be filled with quarks .... and it would attract a layer of negatively charged particles that 'could' support a crust of neutrons.
Doesn't this challenge the consensus view of the structure of pulsars, more than explaining just the structure of neutrons on the surface.
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The consensus among astronomers, based upon observations of the [#permalink] New post   28 Mar 2024, 07:32
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I have the same doubt as adi7 has. I think it is because the conclusion says that the 'surface' could support a crust of neutrons. It does not mean that its structure includes neutrons. But I feel I am not sure and just making it up.­
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Re: The consensus among astronomers, based upon observations of the [#permalink] New post   29 Mar 2024, 23:04
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D is wrong because the bolded portion does not describe a "new finding." It isn't even presenting a finding at all (as in the result of research or experiment). It's only describing what would happen, in theory, if a quark-filled pulsar existed. Also, note that even if the bolded portion did present a research finding, we'd have to be told that it was nice in order for D to be supported.

Meanwhile, A does describe something that challenges the consensus view. The preceding sentence has told us that the consensus view is wrong: quasars may be filled with quarks rather than neutrons. Then the sentence containing the bold part comes along to show us how it could be that quasars appear to be made of neutrons: the positively-charged filling could enable a negative outer shell that could then be covered in neutrons. In other words, the bold part is a premise describing the underlying science. That premise supports another premise (there could be a neutron layer on a quark-filled quasar), which in turn supports the conclusion (quasars could in theory be filled with quarks rather than neutrons).
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Re: The consensus among astronomers, based upon observations of the [#permalink]
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