You are given two positively charged particles, of equal magnitude, separated by a distance, "d". what will happen to the force field between the two particles when "d" is doubled? a) remain constant b) decrease by a factor of two c) decrease by a factor of four d) nothing; no force field between particles

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.