As part of a Physics investigation, a student launches a bean bag out of an open window with a velocity 4.5 m/s at an angle of 25° above the horizontal. If the winds is 12 m above the ground, how far away from the building must the student’s friend stand to catch the bean bag at ground level?

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.