Imagine a room with four walls, with a nail placed in the center of each wall, as well as in the ceiling and floor, six nails in all. the nails are connected to each other by strings, each nail connected to every other nail by a separate string. these strings are of two colors, red or blue, and of no other color. all these strings obviously make many triangles, because any three nails may be considered the apexes of a triangle. can the colors of the strings be distributed so that no one triangle has all three sides (strings) of the same color? if so, how? and if not, why not?

It is 5 hope this you out 

Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3

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