In this video, we explain the capstan equation and how friction affects a rope or string wrapped around a surface. You’ll learn where the equation comes from, what each term means, and how it’s ...

A hands-on physics experiment demonstrates how a basic self-braking pulley works, explaining the forces and friction that allow it to stop itself without extra mechanisms. What happened with the 14th ...

Tennessee executed Harold Wayne Nichols by lethal injection Thursday in Nashville for the 1988 rape and murder of Karen Pulley, a 20-year-old student at Chattanooga State University. Nichols, 64, had ...

"It means cleaning house, narrowing the viable paths forward, and no longer spending energy on what are evidently dead ends." When you purchase through links on our site, we may earn an affiliate ...

The 2025 Nobel Prize in physics has been awarded to a trio of scientists – a Briton, a Frenchman and an American – for their ground-breaking discoveries in the field of quantum mechanics. John Clarke, ...

Brazilian President Luiz Inacio Lula da Silva has criticised the deployment of United States naval forces to the Caribbean, calling them a source of strain that could undermine peace in the region.

Over the past decade, two very different ways of calculating the rate at which the universe is expanding have come to be at odds, a disagreement dubbed the Hubble tension, after 20th-century ...

Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New findings risk turning the tension into a crisis, scientists say. When you ...

The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous -- and highly debated -- results had shown: The Universe is expanding faster than predicted by ...

The Hubble tension is one of the biggest mysteries in cosmology. It centers around the Hubble constant—the measurement of how fast our universe is expanding—which comes out as two different numbers ...

An American professor and a British Canadian professor won the Nobel Prize in Physics on Tuesday for their decadeslong, trailblazing research forming the building blocks of artificial intelligence.