The earth is made mostly of metals and rocks. where did this material come from? it was made by nuclear fission of uranium and other radioactive materials. it was produced in the big bang. it was created by chemical reactions in interstellar space. it was made by our sun. it was produced by nuclear fusion in stars.

it is a negative acceleration

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.