Would Tai Chi work in outer space? [more inside]
posted on Aug 5, 2008 - 6 answers

What are those things called that you see on badge clips and rock climbing walls that automatically retract a nylon cord? [more inside]
posted on May 21, 2008 - 10 answers

Why is the Big Bang possible? [more inside]
posted on Feb 20, 2008 - 24 answers

You know the playground trick whereby four of you can "levitate" a fifth person using just your fingertips (you first hold your hands over his head and count to 20)? How does that work, then?
posted on Nov 21, 2007 - 20 answers

How would a metal bar built around the world react to gravity? [more inside]
posted on Nov 1, 2007 - 36 answers

Imagine a world in which the atmospheric density is somewhat greater than ours, but gravity is somewhat lower. How might our experience be different on that world? [more inside]
posted on Jan 8, 2007 - 16 answers

Does gravity make small pools of water curve slightly (I’m thinking a small lake size) or is surface tension enough to flatten it out? More importantly - how would I calculate whether the resistance from the surface tension is enough to keep it flat and when/what size that breaks off? [more inside]
posted on Oct 11, 2006 - 19 answers

Has anyone ever had sex in space? [more inside]
posted on Sep 22, 2006 - 41 answers

Why do videogames with physics simulation always have things fall too slowly? [more inside]
posted on Apr 25, 2006 - 16 answers

If General Relativity is accepted as true, why do Physicists talk about (and look for) Gravitons? [more inside]
posted on Mar 28, 2006 - 14 answers

Gravity/Life/SocietyFilter: So the Earth is all lumpy, with more or less gravity in some places. Has anyone ever corroborated it with life/social/world things? Many questions inside... [more inside]
posted on Feb 18, 2006 - 33 answers

How does this work? [more inside]
posted on Mar 10, 2005 - 15 answers

Science hour question: My niece asked me this and I didn't have a good answer. People in orbit around the earth are "weightless." But what would happen if an object in space were kept stationary at 150-200 miles up? Would an astronaut in such a stationary but very high station in fact feel significant gravity? Is "weightlessness" (in near-Earth space) an artifact of a free-fall orbit? C'mon rocket scientists, I know you're out there.
posted on Dec 12, 2004 - 20 answers

ScientificIlliterateFilter: If the sun's gravity is so strong as to keep whole planets circling it in orbit (even ones million of miles away), how come light and heat (incredibly fragile things compared to planets) can escape as rays (or whatever they are)?
posted on Nov 14, 2004 - 53 answers