Urban runoff entering a storm drain. Stormwater is water that originates during precipitation events and snow/ice melt. Stormwater can soak into the soil (infiltrate), be held on the surface and evaporate, or runoff and end up in nearby streams, rivers, or other water bodies (surface water). In natural landscapes such as forests, the soil absorbs much of the stormwater and plants help hold stormwater close to where it falls.
The electric field from any number of point charges can be obtained from a vector sum of the individual fields. A positive number is taken to be an outward field; the field of a negative charge is toward it. This electric field expression can also be obtained by applying Gauss' law.
The Electric Field â¢Replaces action-at-a-distance â¢Instead of Q 1 exerting a force directly on Q 2 at a distance, we say: â¢Q 1 creates a field and then the field exerts a force on Q 2. â¢NOTE: Since force is a vector then the electric field must be a vector field! E & F qE & &