i) Define glass transition temperature in the case of polymeric materials, and name two parameters that can affect it. ( 5 points) ii) An epoxy matrix is reinforced with 40 vol\% E-glass fibers to produce a 2cm diameter composite that is to withstand a lond of 25,000N. Calculate the stress acting on each fiber. The elastic modulus of the E glass is 10.510psi and the elastic modulus for the epoxy is 0.410+psi. (15 points) 1psi=6894.76Pa