Potassium ions

$($

K

$+$

$)$

m

o

v

e

$$across

a

$7$

$.$

$0$

$-$

n

m

$-$

thick cell membrane from the inside

t

o

$$the outside. The potential inside the cell

i

s

$-$

$8$

$0$

$.$

$0$

m

V

$,$

$$and the potential outside

i

s

$$zero$.$

What

i

s

$$the change

i

n

$$the electrical potential energy