"These guys ask "What is friction?" They say friction always makes it harder for things to move."
When And Why Does Pascal's Law Work?
Why Doesn't Saltwater Freeze?
Twin Paradox Again
Weird Space Drives That Won't Work
Roofing Friction Tests
Source Of Electron's Energy
Freezing Water At Constant Volume
'acceleration' Due To Gravity
Boiling Point And Pressure
6900 questions have been answered online since 1998 by volunteers from the Department of Physics at the University of Illinois' Physics Van outreach program. We've tried hard to make this the most reliable physics Q&A site on the Web, but no site is perfect, as we explain on this note. Our Baloney feature provides examples of how shaky many other sites are.
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Although we recommend not using our informal site as a cited reference, students who are in a rush and can't find a more proper peer-reviewed source can check our citation information section.