What allows composites (such as carbon-fiber-reinforced polymers) to be so strong and elastic? select all that apply.
- high kinetic energy of the molecules
- extensive cross-linking between molecules
- size of polymer molecule
- properties of metals and plastics

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

What are the 4 phases of matter in order of increasing engery content?

What is the standard unit of measure for acceleration?