mass
the length of something is a physical property of matter and that includes centimeters
Matter is something which occupies space and has mass.
Its mass
Yes. In order for something to be considered matter, it must have mass and volume. Mass is a measure of the number of atoms in something, and volume is a measure of the space it takes up.
mass
Mass is the amount of matter in an object, and volume is the amount of space something takes up (example, air takes up space)
drop it in water and measure how much water came up
The measure of how much matter something contains is called mass. It is usually quantified in grams or kilograms. Mass is a fundamental property of an object, representing the amount of material present in it.
If there is a 'something' there, then trust me, there is matter in it.
No, because matter is something that takes up spaces, and matter is something that you cant see.
It's something related with the custom. Or it doesn't matter much.
matter
If there is something that people want, it will almost always be somewhat scare, no matter how much of it physically exists because of high demand. High demand always leads to low supplies.
One of the unsolved questions about our Universe is why it is composed almost entirely of matter. In our understanding of our Universe, the ratio of matter to anti-matter should be about 50-50. Saying, "All the anti-matter went into the super-massive black holes (smbh) at the center of galaxies" doesn't solve very much. It just leads to the question, "Why did only anti-matter go into smbh, and not matter?" There is SOMETHING about our Universe that favors matter over anti-matter. We just don't yet know what that something is. Simply saying that it is something that makes anti-matter, but not matter, go into smbh doesn't really solve much.
Yes, matter can be something that you can not see. This is because one form of matter is gas, which can not be seen.
Everything that consumes something of matter expels something of matter. So yes, they do.