The Young double-slits with 53.4 um separation between the slits is illuminated
with 548.3 nm. If a viewing screen is located 2.4 m from the slits, find the
distance (in meters) from the first dark fringe on one side of the central
maximum to the second bright fringe on the other side (please read the problem
carefully).

Two wooden members of 80 × 120-mm uniform rectangular cross section are joined by the simple glued scarf splice shown. knowing that β = 22° and that the maximum allowable stresses in the joint are, respectively, 400 kpa in tension (perpendicular to the splice) and 690 kpa in shear (parallel to the splice), determine the largest centric load p that can be applied using mohr's circle. (round the final answer to two decimal places.)