Scientists divide time into four main sections. two sections are the precambrian and the paleozoic. what are the other two sections?

a.
triassic and cenozoic

b.
pennsylvanian and mesozoic

c.
ice age and precambrian

d.
cenozoic and mesozoic

Fossil fuels are organic compounds that are made from

Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.

A0.100-kilogram apple hangs in a tree 1.50 meter above the ground. ignore frictional effects, the total mechanical energy of the apples is