Carlos brings a pair of identical yo-yos (modeled as solid disks with rotational inertia , 05 ) to the top of the stadium bleachers of height H. The yo-yos both have a mass M and a radius R and are wound with a string so thin that the mass of the string can be ignored. Carlos simultaneously drops one yo-yo while he lets the other unwind.

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.