Two experiments are performed.
in (a), an 18.0 n force pushes horizontally on a 2.00 kg block that then pushes on a 4.00 kg block.
in (b), an 18.0 n force pushes on a 4.00 kg block that then pushes on a 2.00 kg block.
which statement is correct?

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."