I need help 8th grade science test review will give brainest

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 .

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.