Solve a basketball jump physics problem by tracking how mechanical energy changes from takeoff to peak height. This video explains kinetic energy, gravitational potential energy, and energy ...

This video shows how to apply the work–energy principle to real physical systems beyond ideal point particles. Learn how external work, internal forces, and energy losses are handled in practical ...

Physicists have long relied on the idea that electrons behave like tiny particles zipping through materials, even though ...

If ever spotted in the emptiness of space, according to theoretical physicist Eugeny Babichev of the University of ...

Dark energy may be the most mysterious substance ever proposed, but many scientists are certain it exists. Why?

The U.S. Energy Dept. has withdrawn its federal definition of zero-emissions buildings and ended related technical assistance that many states and owners used as a benchmark. December 5, 2025 The U.S.

U.S. Department of Energy Headquarters, the Forrestal Building, in Washington, D.C. (Payton Chung/Flickr/CC BY-SA 2.0 DEED) DOE added that the definition established in 2024 was not a regulatory ...

Most of us first hear about the irrational number π (pi)—rounded off as 3.14, with an infinite number of decimal digits—in school, where we learn about its use in the context of a circle. More ...

Elon Musk has outlined a future where money loses its purpose and energy becomes the core unit of value in society, driven by breakthroughs in artificial intelligence and robotics. Speaking on a ...

Elon Musk called Bitcoin a “physics-based currency” tied to energy and suggested that advances in AI and robotics could eventually make money obsolete. Tesla and SpaceX CEO Elon Musk has reignited ...

The reorganization reflects the ongoing shift in the federal government’s energy priorities: less renewable energy, more fossil fuels. By Brad Plumer Reporting from Washington The Energy Department is ...