(si units) in a tensile test, the starting gage length = 100.0 mm and the cross-sectional area = 150 mm2. during testing, the following force and gage length data are collected: (1) 17,790 n at 100.2 mm, (2) 23,040 n at 103.5 mm, (3) 27,370 n at 110.5 mm, (4) 28,910 n at 122.0 mm, (5) 27,480 n at 130.0 mm, and (6) 20,460 n at 135.1 mm. the final data point (6) occurred immediately prior to failure. yielding occurred at a load of 19,390 n (0.2% offset value), and the maximum load (4) was 28,960 n. (a) plot the engineering stress strain curve. determine (b) yield strength, (c) modulus of elasticity, (d) tensile strength, and (e) percent elongation.

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)?