Suppose that a ball is released from the window of a train that is moving with constant velocity.  The path of the ball, as observed from the train window, will be a horizontal straight line. true or false
please need a answer

How will the system respond to a temperature increase?

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.

If you drive 12 miles north and 35 miles east, what is the direct distance between you and your starting point?