Physics

Search for patents and trademarks from the U.S. Patent Office.

Search Google for patents with their advanced search.

Your resource for unit conversions.

Convert just about anything to anything else. Thousands of units, and millions of conversions.

MathWorld is the web's most extensive mathematical resource, provided as a free service to the world's mathematics and internet communities as part of a commitment to education and educational outreach by Wolfram Research, makers of Mathematica.

Real-time physics simulations that interact and animate in real time.

Information at the foundation of modern science and technology from the Physical Measurement Laboratory of NIST.

The oPhysics website is a collection of interactive physics simulations. It is a work in progress, and likely always will be. Content will be added as time allows.

It is an open-code resource that uses dynamic computation to illuminate concepts in science, technology, mathematics, art, finance and a remarkable range of other fields.

This online laboratory brings interactive practical science to students anywhere and anytime the internet is available. The laboratory features investigations based on on-screen instruments, remote access experiments and virtual scenarios using real data.

Use the HTML5 link to access over 200 simulations for introductory physics. The simulations are useful for both high school and college/university.

Free physics labs and resources available from the Physics Aviary.

Precise ephemerides of the Sun, Moon, planets, and satellites, data for eclipses and other astronomical phenomena for a given year.

The laws list is a list of various laws, rules, principles, and other related topics in physics and astronomy.