Question

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

Answer 1

Two of the below answers are correct.

• extensive cross-linking between molecules
• properties of metals and plastics

Step-by-step explanation:

A composite material also known as composition material or shortened to composite, is a material made up of two or more component materials with significantly different physical or chemical properties. when combined, provide a material with properties different from the individual.

so the properties that make carbon fiber strong and elastic are extensive cross linkage between molecules, And they also contain both properties of liquid and solid.

Answer 2

I think there would be two correct answers from the choices listed above. These are the second and the last option. Composites are strong and elastic because of the extensive cross-linking between molecules and the properties of metals and plastics. Hope this answers the question.