3) A boat has a mass of 14,500 kg. How much force do its engines need to apply to get it to accelerate at 0.58 m/s- assuming there is no resistive force?
4) A baseball has a mass of 0.145 kg. If a baseball bat hits it with 840 N of force, what will the acceleration of the baseball be?

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.