Gunpowder residue is most likely to show up where on a shooters hands

Gunpowder residue is most likely to show up in the space between the thumb and the index finger on a shooter hands.

Explanation:

Gunpowder residues are the microscopic particles and other residual materials expelled from a firearm with each shot. These particles can be deposited on the face, hands and clothing of a shooter, and on any surface near the landfill (including the human, animal, or object being targeted).

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 .

grav forces affect all objects magnetic forces affect magnetic objects and electric currents