Variations in the resistivity of blood can give valuable clues about changes in various properties of the blood. suppose a medical device attaches two electrodes into a 1.5-mm-diameter vein at positions 5.0 cm apart. what is the blood resistivity if a 9.0 v potential difference causes a 230 μa current through the blood in the vein?

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.