What is the banana equivalent dose of standing around in the United States for a year due to cosmic rays which penetrate our atmosphere

Ineed with these 2 questions. you.

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.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.