A boat turns off its engine while traveling at 10 m/s, and then a constant drag force slows the boat to a stop, while traveling an additional 80 m. The mass of the boat is 600 kg . What is the magnitude of the constant drag force, in Newtons, required to stop the boat in 80 m?

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.