In order to facilitate comparison of various materials, this value can be multiplied by the bulk density of the material in grams per cc resulting in {HEAD ~ a surface area} expressed as {TAIL ~ square meters} per cc 
expressed as
In order to facilitate comparison of various materials , this value can be multiplied by the bulk density of the material in grams per cc resulting in { HEAD ~ a surface area } expressed as { TAIL ~ square meters } per cc
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH