A new, improved CNC machining center is now available, and experimental data show that it is more accurate than the old machine. It is able to drill the holes such that the distance between the holes is normally distributed with mean 4 cm and standard deviation 0.1 mm. The old CNC center produces brackets where the distance between the holes is normally distributed with mean 4 cm and standard deviation 1.0 mm. The covariance between the distances between the holes drilled on the old and new machine is zero. You want to make sure that for 98% of all the manufactured brackets, the distance between the holes is smaller than 4.03 cm. Required:
How much of the production [%] needs to be at least directed to the new CNC center to achieve this (if you have one new and one old machining center)?

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?