An iron fence is left unpainted and it reacts with the oxygen in the air forming rust the formation of rust is an oxidation-reduction, but is also an example of?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Who was the first scientist to measure speed as distance over time?

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.