Cold Metal - "Cold" metal and "warm" wood may be the same temperature.

Cold Metal  "Cold" metal and "warm" wood may be the same temperature. Your hand is not always a good thermometer. When you touch a variety of...

Circles of Magnetism IV - Two parallel, current-carrying wires exert forces on each other.

  Circles of Magnetism IV  Two parallel, current-carrying wires exert forces on each other. When an electric current flows through...

Circles of Magnetism I - You can make a magnetic field that's stronger than the earth's!

  Circles of Magnetism I  You can make a magnetic field that's stronger than the earth's! Compass needles are little magnets that are...

Cheshire Cat - Make a friend disappear, leaving only a smile behind.

Cheshire Cat  Make a friend disappear, leaving only a smile behind. Under most circumstances, both of your eyes receive fairly similar...

Charge and Carry - Store up an electric charge, then make sparks!!!

Charge and Carry  Store up an electric charge, then make sparks. Are you tired of electrostatic experiments that just won't work? This experiment...

Center of Gravity - How to balance a checkbook using the physics method !

Center of Gravity  How to balance a checkbook using the physics method. Here is an easy way to find the center of gravity of a long, thin object,...