Electric fields are vector quantities whose magnitudes are measured in units of volts/meter (v/m). find the resultant electric field when there are two fields, e1 and e2, where e1 is directed vertically upward and has magnitude 99 v/m and e2 is directed 48° to the left of e1 and has magnitude 164 v/m.

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.