We plan on using thermal evaporation chamber to grow a metal alloy (thin film) with Cu 2.0 wt% (weight percent) and Al 98.0 wt%. Source temperature is controlled at 1350K. Please estimate what the target concentrations (weight percent) are in order to maintain the right alloy composition. (Vapor pressure for Al at 1350K is 10-3 torr, and for Cu at 1350K is 2x10-4 torr. Note that if we change the source temperature for growing this alloy, the target concentration needs an adjustment based on their vapor pressure variations.)

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.

Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms

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)?