From the information given, i can't give you an actual number. But I can tell you that if a rock has a high porosity (its very porous which means that liquids can easily pass through) and has high permeablilty (liquids are able to enter the rock with ease), then groundwater could flow through this rock easily and faster than a rock that has a low porosity and low permeability.
Electrical energy involved the flow of charged particles
This will lead to depression?
Both answers are A. If not im sorry
The research and studying optical nervous system. into eye