Heroin, Oxycodone, Oxymorphone, Hydromorphone.
These are some.
The answer is, "Lithosphere plate boundaries."
Most earth quakes occur in the upper 10-12 miles of the earth crust as the result of failure on faults caused by the strains induced by plate motions.
I hope this helps!
NaCl is dissolved in water so that in a given region or volume the concentration is initially higher in one part than the other l, thus simple diffusion will occur so that there is a net difference or 0, with respect to the concentration of NaCl in a particular volume of water than another. Basically the NaCl will be distributed throughout volume of water.