The official object that defines the mass of a kilogram is a tiny, 139-year-old cylinder of platinum and iridium that resides in a triple-locked vault near Paris. Because it is so important, ...
Practical Engineering on MSNOpinion
What redefining the kilogram really means in practice
We explore how the kilogram is defined using a diy watt balance built from simple components. The experiment connects ...
The LIGO gravitational wave observatory in the United States is so sensitive to vibrations it can detect the tiny ripples in space-time called gravitational waves. These waves are caused by colliding ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback