Students distinguish between accuracy and precision of measurements. Accuracy, Precision, and Significant Digits: Students distinguish between accuracy and precision of measurements and make ...

A new, extremely precise measure of Avogadro's number, a fundamental constant, could ensure solid footing for a new definition of the kilogram that does not rely on a single hunk of metal sitting in ...

Cecilia Van Cauwenberghe explains how to measure the future using nanoscale metrology and discusses the global competition ...

What is the weight of a proton? Scientists from Germany and Japan have made an important step toward better understanding this fundamental constant. By means of precision measurements on a single ...