Compare the patterns of field lines in each gravitational field model. What can you conclude about the strength of the field models? Choose all that apply. A) The strength of the gravitational field is the same at the surface of the Sun, Earth, and the moon.
B) The strength of the sun's gravitational field decreases as the distance from the sun increases.
C) The gravitational field at Earth's surface is greater than the gravitational field at the moon's surface. ​

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.