Please help, Will give brainliest

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.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)