If an arrow is shot upward on mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t − 1.86t2. (round your answers to two decimal places.) (a) find the average speed over the given time intervals.

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?