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Anuta_ua [19.1K]
3 years ago
10

What could be the possible shape of universe with an evidence. ​

Geography
1 answer:
erik [133]3 years ago
7 0

Answer:

Explanation:

8

When we talk about the "shape" of the universe. It is its intrinsic shape, not the embedding of the universe within a larger space.

It does make sense to talk about the intrinsic shape. Properties like "curvature" can be measured from inside a shape, you don't need suppose that the universe is "in" something to talk about its shape.

Now the space of the universe is three dimensional, this creates visualisation problems. So I'm going to first talk about an imaginary 2d universe:

A 2d universe could be flat, with a curved boundary (like a disc) Or it could be flat with no boundary (an flat infinte plane). Or a 2d universe could be intrinsically curved. If it has positive curvature it could be like the surface of a ball (positive curvature, finite with no boundary) Or shaped like a bowl (positive curvature) Alternatively it could have negative curvature: it could be shaped like a "Pringles crisp" These have negative curvature (this can happen with or without a boundary). Finally there could be regions with different curvature: positive in some parts, negative in others.

The same possibilities exist for our universe: It could be flat (with or without boundary) It could be positively curved (This is intrinsic curvature and your brain can't visualise this for a 3d shape) Or it could be negatively curved (again, don't try to visualise this for a 3d shape, you can't). In the case of positive curvature, it could be finite and unbounded, but for negative curvature, it must either have an edge, or be infinite.

So mathematically these are the possibilities. What does the science say?

We can measure the curvature on large scales. Our measurements are not perfect, there is some room for error. We measure the large scale mass/energy density of the universe, since curvature is caused by gravity, and gravity is caused by mass and energy. If the mass/energy density is > 1 then space would be positively curved. We actually find that the energy density is 1.00±0.02 That is the universe is either flat, or very nearly flat.

No there are profound problems with supposing that the universe has a boundary. But there are also problems with supposing it to be infinite. Scientifically, no edge has ever been detected. So when we build models of the universe, we will generally suppose to have no edge.

Thus our "best guess" is that the universe is uncurved and infinite.

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Answer:

Option (A)

Explanation:

In the above-given question,

Option (B) is wrong with it's usage of the modifier "how'' in the sentence. If the modifier is used in one place (how heat from the inner core flows), it should also be used in the continuing clause (how the formation and periodic reversal).

Options (C) and (D) are wrong in using the word "are" for the whole sentence as there is no need to use this word. The verb form will depend on the subject, in this case, is "the discovery that earth's inner core" which is singular in nature. Thus, the verb form will be -is and not -are.

Option (E) is wrong for it's use of the comma. If the comma is used, then the whole sentence is not a full-fledged sentence but rather a dependent clause with no resolution.

The correct answer for the given passage is option (A).

4 0
2 years ago
Read 2 more answers
Fine-grained clastic rocks are ______. Multiple choice question. easily eroded eroded with difficulty eroded with drastically di
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A property of fine-grained clastic rocks is that they are easily eroded.

<h3>Why are these rocks easily eroded?</h3>

Fine-grained clastic rocks have small fragments and grains which make them lighter than other rocks.

As a result they are more susceptible to weathering which then allows them to be easily carried off by water or air.

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Find out more on weathering at brainly.com/question/12734041.

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250 word narrative about your personal American cultural experience
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Hey there! Hello!

So, I don't want to write this for you (in fact, I'm pretty sure I'm not allowed to) since I can't exactly identify your personal experiences with American culture. But, I can give you some pointers for this narrative to base you writing on. 

It helps to know exactly what the staples of American culture are. Basically, think of all of the things that makes America, America. What does the American experience mean to you? Is it the freedom to practice your religion, or have the ability to express yourself in the (legal) ways you choose? Is it the ability to enter and end relationships and marry whoever you want in the eyes of the law? Is it our diverse and multilingual nature? Is it the food that people first think of when they hear "Do you want American food for dinner?" Is it the artistic aspect of living here, where art museums, ability to major in art and writing, and general exposure to art and writing is common? Is it the prominence of music in our modern society? Is it the sports that bind the people of the nation together? Is it the (only sort-of limited) ability for LGBT people to live fearlessly in the eyes of the law and nation as a whole, with communities and help they can look to in their times of need? 

What defines the experience for you? What's important to you as an American? That's what they're trying to get at with this assignment. Feel free to explore topics of American culture that go beyond the ones I have listed here, since there must be many more. 

Hope this helped you out! Feel free to ask me any additional questions if you have any. :-)
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