How does one go about measuring the mass of an object? Mass is defined as the amount of matter an object contains. This is very different from weight, of course, as the mass of our object would remain ...

Precise values for the masses of the nuclei of the simplest atoms, such as hydrogen and helium, are crucial for experiments targeting big unsolved problems in physics. A technique known as ...

Atomic clocks are established as the most precise timekeepers created. Atomic clocks work by deploying lasers to measure the vibrations of atoms (electromagnetic signals). By atoms oscillating at a ...

July 21 (UPI) --A team of scientists from Germany and Japan have recorded the most precise measurement of a proton's mass. Researchers accomplished the feat by trapping a proton in a super sensitive ...

Atomic nuclei are normally compact structures defined by a sharp border. About twenty-five years ago, it was discovered that there are exceptions to this picture: Certain exotic atomic nuclei contain ...

The race is on. Scientists across the globe are hustling to build the latest, greatest—and most accurate—timekeeping device. But rather than working with high-precision gears and pendulums, these ...

Time might feel like something we've got a pretty good handle on, but scientists are trying to find new ways to measure it ever more accurately. In recent tests run by the National Institute of ...

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FOR THE FIRST TIME, scientists have determined the forces needed to move a single atom across a surface. With this advance, it's now possible to quantify friction at the atomic level. Knowing how ...

For the first time since 1981, when China deployed the DF-5 intercontinental ballistic missile, a new state has gained the capability to target the United States with a nuclear weapon. On July 4 and ...