Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to
separate different parts of a rock into pure substances. this is because a rock is aan)
compound
element
mineral
mixture

The plum pudding model of the atom states that ?

Awalk up the phase change graph worksheet

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.