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Your Math and Physics Questions Answered

Your Math and Physics Questions Answered
Physicist: This famous equation is a little more subtle than it appears. It does provide a relationship between energy and matter, but importantly it does not say that they’re equivalent. First, it’s worth considering what energy actually is. Rather than being an actual “thing” in the universe, energy is best thought of as an abstract (there’s no such thing as pure energy). Energy takes a heck of a lot of forms: kinetic, chemical, electrical, heat, mechanical, light, sound, nuclear, etc. Each different form has it’s own equation(s).

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Hammack Home This book is an introduction to the standard methods of proving mathematical theorems. It has been approved by the American Institute of Mathematics' Open Textbook Initiative. Also see the Mathematical Association of America Math DL review (of the 1st edition), and the Amazon reviews. The second edition is identical to the first edition, except some mistakes have been corrected, new exercises have been added, and Chapter 13 has been extended.

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5 Ancient Acts of War That Changed the Face of the Earth Nothing motivates people like war. That's how the Great Wall of China got built--they were protecting themselves against enemies who lived to the north. But that wall is hardly the only time we've changed the face of the planet in the name of winning a war. Some of the ass kickings unleashed with ancient empires on the line were so mind-boggling, the Earth still hasn't recovered. #5. Alexander the Great Turns an Island Into a Peninsula

Meet the 12 year old with an IQ higher than Stephen Hawking’s - TNW Shareables As a three year old with a passion for stars he went on a tour of the Holcomb Observatory and Planetarium at Butler University in Indianapolis. This is the day his mother Kristin Barnett would never forget (via the IndyStar): “We were in the crowd, just sitting, listening to this guy ask the crowd if anyone knew why the moons going around Mars were potato-shaped and not round.Jacob raised his hand and said, ‘Excuse me, but what are the sizes of the moons around Mars?’ ”The lecturer answered, and Jacob looked at him and said the “gravity of the planet . . . is so large that (the moon’s) gravity would not be able to pull it into a round shape.”Silence.

Tying Light in Knots [Slide Show] Knots can help unravel some knotty (sorry!) situations. The mathematical study of knotted shapes has proved constructive for many branches of physics, from understanding how fluids flow to developing quantum computers. Now physicists have found that light itself can be knotted by discovering a new set of solutions to the famous Maxwell equations of electromagnetism.

The World Factbook The Office of Public Affairs (OPA) is the single point of contact for all inquiries about the Central Intelligence Agency (CIA). We read every letter, fax, or e-mail we receive, and we will convey your comments to CIA officials outside OPA as appropriate. However, with limited staff and resources, we simply cannot respond to all who write to us. Contact Information Submit questions or comments online By postal mail: Central Intelligence Agency Office of Public Affairs Washington, D.C. 20505

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