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• How much of the energy the earth gets from the sun is in the visible spectrum?

  Asked by 6rant6 | 10 responses

• Would it be possible to convert our assorted cyclotrons, linear accelerators and particle colliders to emit a directable stream of particles?

  Asked by Nullo | 10 responses

• Does the speed of light change?

  Asked by Satchafunkilus | 10 responses

• NSFW How's it hangin'?

  Asked by Earthgirl | 112 responses

• What model of probability applies to atomic decay?

  Asked by submariner | 16 responses

• How much time does it take for light to travel from here to Mars?

  Asked by sammycarter | 9 responses

• How does the moon, based on it's size and weight, orbit the Earth when the Earth has relatively weak gravity?

  Asked by whiteliondreams | 22 responses

• Does Mars have the gravitational wherewithal to support a breathable atmosphere?

  Asked by Nullo | 11 responses

• How probable is a 4th spatial dimension?

  Asked by HolographicUniverse | 20 responses

• What is Time?

  Asked by Mr_Paradox | 25 responses

• Inertia problem? Inertia of air?

  Asked by prasad | 6 responses

• If two objects fly in opposite directions can they both reach the speed of light relative to the starting point?

  Asked by Zyx | 13 responses

• Do you think that knowledge obtained by human science or natural science is more biased?

  Asked by ilvorangeiceblocks | 12 responses

• Who performs Chemical Body Burden Testing for human toxins?

  Asked by radcliff | 7 responses

• What are the implications of CERN's discovery of a Higgs boson-like particle?

  Asked by mattbrowne | 32 responses

• Water expands when it freezes. Ice takes up more space than water. Where do I find the formula?

  Asked by elbanditoroso | 6 responses

• What do you make of this reality and its quirks?

  Asked by fremen_warrior | 23 responses

• Under what conditions would polonium 210 (Po-210) start a nuclear reaction?

  Asked by radcliff | 5 responses

• Why aren't the reactors and cooling tanks of nuclear power plants built below water level?

  Asked by gorillapaws | 9 responses

• Is there a neutral state prior to karma?

  Asked by whiteliondreams | 46 responses

• As a proton falls into a black hole, it accelerates. How large will its mass become as it approaches light speed?

  Asked by Bill1939 | 26 responses

• How does an IFR observer measure the speeds of two craft going oppisite directions approaching "C"?

  Asked by mr_g | 8 responses

• Why does time "speed up" as we age?

  Asked by Carol | 29 responses

• What source and strength of radioactivity could cause mercury dental fillings to become radioactive?

  Asked by radcliff | 4 responses

• I got a B+ final grade from a [B+, 30%] and [A, 50%] with a remaining 20% participation. What did I get in participation for my final grade to be a B+?

  Asked by erniefernandez | 11 responses

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