Two previously undeformed specimens of the same metal are to be plastically deformed by reducing their cross-sectional areas. one has a circular cross section, and the other is rectangular; during deformation the circular cross section is to remain circular, and the rectangular is to remain as such. their original and deformed dimensions are as follows. which of these specimens will be harder after plastic deformation? circular (diameter, mm) rectangular (mm) original dimensions 15.2 125 × 175 deformed dimensions 11.4 75 × 200

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)?