It is hard to find because it doesn't have a significant amount of interaction with normal matter - except through gravity.
Yes. Your hair will get damaged by any dye no matter what color your hair previously was.
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.
By definition dark matter isn't something you can see. In scientific terms you might say it possesses mass but doesn't interact electromagnetically, that is, it does not absorb or emit light. This makes it hard to study; however, its effects are visible in somewhat the same way that wind is invisible but dust and leaves blowing in it can be seen: studies in the behavior of galactic and galactic cluster rotation hint at its presence, as do observations of cosmic background radiation and gravitational lensing. Particle physicists continue to search for a particle which would be a good candidate to explain this type of matter; alternative theories for its effects not involving matter are being developed.
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.
Yes. Your hair will get damaged by any dye no matter what color your hair previously was.
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.