Derek and wes take a photograph of a lake at the same angle and the same time of day. derek's picture comes out with crisp edges around objects in the photo. wes's picture seems to blur the outlines of objects due to glare. which wave phenomenon best explains the differences between the pictures? diffraction dispersion reflection polarization

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.