I enjoy studying physics as a hobby and think physics stack exchange is great!
Music Video of the moment. .Just a great song and video.
The Perfect Band. .Good use of stock footage
Physics
Q&A for active researchers, academics and students of physics
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
Q&A for professional and enthusiast programmers
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Academia
Q&A for academics and those enrolled in higher education
Computational Science
Q&A for scientists using computers to solve scientific problems
Homebrewing
Q&A for dedicated home brewers and serious enthusiasts
Quantitative Finance
Q&A for finance professionals and academics
Sports
Q&A for participants in team and individual sport activities
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
