Free Fall Apparatus Economy, for determination of the gravitational constant ft gft, This kit has a wooden base, 1.1m rod and a movable electro magnet, can be moved anywhere on the rod, when the ball is released the timer is triggered and stopped one the ball his landed on the base
Digital Differential Counter, electronic, LED display, auto-switching, Dimension: 3.75x10x1.75 inch, Weight: 1 lb, 8 red and white Color buttons, Pictures and names of blood cells next to each button, 9 3-digit LCD