How does newton's third law explain the forces involved when a car hits a concreate barricade

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 .

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.