Dark matter is hard to understand because it does not interact with light, making it invisible and difficult to detect. It does not emit, absorb, or reflect light, and its exact nature remains a mystery. Additionally, dark matter does not cluster in the same way as normal matter, further complicating its detection and study.
It is hard to define matter because it changes. It is the composed to atom.
"Dark Matter" is currently only a mathematical concept, a "fudge factor" thrown into some calculations to make the numbers work out. We have no idea if "dark matter" really exists, how it would affect the universe, or how it might be detected or manipulated. It's all guesswork, and all the scientists have conflicting guesses. For myself, I suspect that there are some fundamental things that our theories do not yet understand, and that in the future, we'll discover that "dark matter" will prove to be nothing at all.
Dark matter is a hypothetical form of matter that does not emit, absorb, or reflect light, making it difficult to detect directly. Its composition is unknown, but it is believed to be made up of some unknown particles that do not interact with normal matter except through gravity.
It was not there, It is very hard to understand.
Depends what you mean by "significance." We know there is SOMETHING out there in our Universe that exerts a gravitational force but does not otherwise interact with ordinary, baryonic matter. However, we do not yet know what this stuff IS. So, in the same way that highly penetrating rays are still called 'X' rays -- even though they are no longer so mysterious that we need to give them the moniker 'X' -- we presently call this stuff "dark matter." When we finally are able to figure out what dark matter is, it will most likely radically change our understanding of the nature of our Universe -- in the same way that x-rays did. It may turn out that dark matter will have no effect on our daily life. Or, once we understand what this stuff is, it may turn out to be as important to us as x-rays are today. In that sense dark matter may or may not have much "significance" to most people.
Not much is known yet about the properties of dark matter, so it is really hard to compare this.
hard stone can be found at dark cave
it is something that one find it hard to completely understand
Pressumably, a kilogram of each would have the same effect. This makes sense according to current theories, but it is hard to verify, given that dark matter has not been identified yet.
Yes, dark matter has a lot of mass. It makes up about 20% of the universe (much more than regular matter). Since it has mass, it also has energy. In fact, dark matter's mass is the main reason we even know it exists. Astrophysicists can observe its gravitational effects, though it is extremely hard to detect in any other way.
why does it really matter it is hard go find somewhere else
Because it is hard to see in the dark.
Which grammar topic is the most difficult is a matter of opinion. Personally, I find prepositions and relative clauses more difficult than adverbs, but adverbs might be the most difficult for some people.
It isn't hard to find love, Emo or Not.. Love finds is ways. It really doesnt matter what you look like, It matters about who your with and suchh[:
Yes.. Both race cant figure each other out...its crazy!
They do not try hard enough to understand it. In many societies it is acceptable, or even a matter of "pride", to admit to being no good at maths.
Yes you can, it's just a matter of searching for them as they can be hard to find in some areas.