Under certain circumstances, potassium ions ( k+ ) in a cell will move across the cell membrane from the inside to the outside. the potential inside the cell is −75.5 mv and the potential outside the cell is zero. what is the change in the electrical potential energy of a single potassium ion as it moves across the membrane?

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.