Potentiometer, an electrical device that measures potential difference between two points in a circuit by comparison with a standard battery of known potential difference. The name is also applied to a variable resistor that provides varying amounts of potential difference.
To the uninitiated, the LHC can look like a junk drawer ... a junk drawer that's full of tiny, rapidly decaying particles that move at light speed. How do scientists know what's where?
Uranium -- the stuff of futuristic energy and atomic weapons. Mining for this valuable element is anything but dull. Think you know how uranium mining works? Take this quiz to find out.