The diffusion flux of copper solute atoms in aluminum solvent from point a to point b, that is 10 µm apart, is 8 × 1017 atoms/ (m2·s) at 500°c. determine the concentration gradient between the two points. (d = 4 × 10-14 m2/s) the concentration gradient between the point a and point b is × 1031 atoms/m4.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.