Use aluminum foil, salt water, and activated charcoal to construct a simple battery strong enough to power a small motor or light. Cut a piece of aluminum foil that is approximately 6 x 6 inches (15 × ...
Use a touchscreen to search for any number hidden in the first 3 million digits of pi. Use a touchscreen to search for any number hidden in the first 3 million digits of pi.
Measure the height of an object indirectly using your hand and a ratio. Many of the numbers we use in science have never been measured directly; we only know them from indirect measurements. How far ...
Plunge into hydraulics with a pair of dueling syringes. Two different-sized syringes full of water are connected together. Push on one, and feel the force—multiplied—in the other. Submerge the tubing ...