Q.13.3 Q 13.6 Q Viscosity is an important property of a polymer melt in plastics-shaping processes. Upon what parameters does viscosity depend? Briefly describe the plastic extrusion process. (1) Provide the definition, (2) write the equation to express the viscosity and define each variable and parameter included in the equation, and (3) describe the factors that can affect the viscosity. (1) Describe the process, (2) list critical process parameters, and (3) provide an example for the application of the extrusion process. (1) Provide the definition for What is the technical difference between each one and (2) describe briefly 13.12 a fiber and a filament? In the context of fiber reinforcement, 14.3 what is a mat? Q 14.9 the properties and applications for each one. (1) Provide the definition of a mat, (2) describe briefly how it is made, and (3) discuss its applications. (1) Describe briefly each What is the difference between the wet approach, and (2) give an lay-up approach and the prepreg approach in hand lay-up? application example for each approach (you may use and cite your sources).