Question

Define the terms
(a) Plastic
(b) Adhesive

Answer 1

(a) $Plastic$ : Plastic is a material consisting of any of a wide range of synthetic or semi-synthetic organic compounds that are malleable and can be molded into solid objects. In the case of plastic deformation, part of the strain cause by the load is not recoverable and the material is permanently deformed.

(b) $Adhesive$ : An adhesive is a substance used for sticking objects or materials together. Adhesive forces is defined closely to its name as the type of forces which acts strongly between the molecules of two different objects as the force of attraction.