Greg drew a diagram to compare two of the fundamental
forces.
which labels belong in the areas marked x, y, and z?
gravitational
force
electromagnetic
force
x: attractive
y: repulsive
z: infinite range
x: infinite range
y: attractive
z: repulsive
x: always attractive
y: infinite range
z: attractive or repulsive
x: attractive or repulsive
y: infinite range
z: always attractive
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Which safety measures should you follow during a thunderstorm? check all that apply. (a) avoid touching anything that conducts electricity. (b) avoid touching a person who has been struck by lightning. (c) go outside. (d) keep your computer turned off. (e) stay out of water. (f) stay inside.

For which pair of objects would adding the same a

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.