Give an example of a model used in earth science. explain why models are particularly important to this field.

The metric unit of electrical power is the watt volt ampere ohm

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.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant