Agraphite -epoxy -reinforced plastic with longitudinal fibers contains 30% graphite fibers, which have a strength of 2500 mpa and an elastic modulus of 300gpa. the strength of epoxy matrix is 120mpa, with an elastic modulus of 100gpa. determine a) elastic modulus of the composite b) elastic modulus of the composite if the fibers are oriented in transverse direction. c) fraction of the load supported by the fibers.

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?