trick question.... because there are four the first two are the most widely known they are diamonds and graphite (like in pencils). There is also amorphous carbon (coal is commonly refered to as amorphous carbon but coal is not pure and is therefore not truly amorphous carbon) the final form of carbon is known as fullerines they were not discovered until 1985 and have many uses in microtechnology. There are two other forms but they are fairly unimportaint and there are two more forms of carbon that are still hypothetical.
Hydrogen, Oxygen, Carbon, and Nitrogen.They are combined in different ways to make different drugs.
The three basic light colors are red, green, and blue. These colors can be combined in various ways to create different hues and shades in the visible light spectrum.
carbonic acid, carbamino compounds and dissolved gas
There are 10 different sets of teachers which can be combined with 4 different sets of students, so 40 possible committees.
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Assuming you mean a sum of 4, there are three ways this can be done: (1, 3), (2, 2) and (3, 1).
One way is if it can be physically combined.
name three ways in which Australia from of government is different from that of great britad
Crimson, scarlet, or maroon. Those are three different ways to say red in English.
Cellular respiration, combustion, and decomposition.
you can arrange three beads 9 different ways.
If you have three DIFFERENT letters, you can arrange them in 3! = 1 x 2 x 3 = 6 different ways.