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• What is time?

  Asked by vacuumloan | 8 responses

• Assuming you believe that you are what you eat, how long does a change in diet take to manifest itself?

  Asked by judyprays | 13 responses

• Is the speed of light constant?

  Asked by Christian95 | 14 responses

• How do bumble bees fly? I heard they defy physics, is that true?

  Asked by RandomMrdan | 21 responses

• Problems with Laplace's Demon?

  Asked by tonedef | 12 responses

• What is that small little hole at the bottom of airplane windows?

  Asked by andrew | 9 responses

• Why does time slow down as one approaches the speed of light?

  Asked by mrswho | 8 responses

• Has anybody reached absolute zero?

  Asked by blastfamy | 28 responses

• Do you believe in the concept of infinity?

  Asked by Blondesjon from iPhone | 44 responses

• What is the most efficient kinetic energy conversion?

  Asked by timothykinney | 7 responses

• How much does an Airbus A320 weight?

  Asked by colog | 8 responses

• Why do airplanes float in water?

  Asked by colog | 15 responses

• Is it possible to land one plane on another?

  Asked by ipodrulz | 16 responses

• A tough physics/fluids question?

  Asked by waterskier2007 | 10 responses

• What materials will hold microwaved heat the longest?

  Asked by pallen123 | 7 responses

• When we harness tidal energy from the moon, what energy source is depleted?

  Asked by ben | 35 responses

• What happens when an unstoppable object collides with an unmoveable object?

  Asked by aanuszek1 | 27 responses

• What cause electrical storms to form above volcanoes?

  Asked by sferik | 7 responses

• What to learn next?

  Asked by binary from IM | 28 responses

• Best website for learning astronomy?

  Asked by advilicious | 7 responses

• Why do people grimace when they are exerting effort?

  Asked by needaclue | 3 responses

• Is there really a difference between a chemical change and a physical change?

  Asked by steve6 | 4 responses

• Does anyone know of open-source software for modeling physics?

  Asked by timothykinney | 1 response

• If the moon stopped moving, would it crash into the earth?

  Asked by Myotyarla | 15 responses

• Are the four known forces subject to thermodynamic law?

  Asked by AstroChuck from iPhone | 5 responses

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