Scientist do their work by using inquiry. Inquiry is:

refers to the diverse ways in which scientists study the natural world and propose explanations based on the evidence derived from their work.

Explanation:

this is scientific inquiry

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

i dont know but

explanation:

whoever your teacher is, deserves a raise for using pokemon as an example