If magnetic field lines are drawn to represent a magnetic field, what would they look like?
A. The lines extend from the north pole to the south pole of the
magnet.
B. The lines extend from the south pole to the north pole of the
magnet.
C. There is no consistent pattern in the lines.
D. Only some of the lines form loops.

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.