Based on their composition materials can be divided into pure and

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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d eras and periods

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered