physics enthusiast and electric bassist, recovering ex-engineer (there's a 12-step program for that but it's notoriously ineffective). Tries to answer questions on the stack exchange in order to help people and improve his game. Website full of weirdly cool stuff he's done at www.nielsenkillowatt.com
Physics
Q&A for active researchers, academics and students of physics
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Engineering
Q&A for professionals and students of engineering
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Lifehacks
Q&A for people looking to bypass life's everyday problems with simple tricks
History of Science and Mathematics
Q&A for people interested in the history and origins of science and mathematics
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Home Improvement
Q&A for contractors and serious DIYers
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Law
Q&A for legal professionals, students, and others with experience or interest in law
Interpersonal Skills
Q&A for people looking to improve their interpersonal communication skills