For an array of fins on a heat sink, if fin efficiency is n = 0.9 and ar=0.05m^2 and ar= 0.25m^2 and there are 25 fins in the array, what is the overall efficiency no?

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)