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
Aquarium light attaches to your AquaSprouts Garden and employs energy-efficient color-changing LED technology. Use the handheld remote to choose one of 16 different color spectrums, adjust intensity and brightness, or choose the fade, smooth or strobe feature from up to 30 feet away