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The Power of Tiny Things

  • By Susan K. Lewis
  • Posted 10.11.05
  • NOVA

If you could convert the mass of a paper clip entirely to energy, how big a punch would it pack? Einstein's most famous equation, E = mc2, indicates the calculation is straightforward: the energy released would be equivalent to the mass times the speed of light squared. Yet the answer is far from intuitive because, for one thing, the speed of light is immense—670 million mph—making the speed of light squared almost inconceivable. In this quiz, discover the answer and explore other examples of what scientists call mass-energy equivalence.

Launch Interactive Printable Version

Einstein’s E = mc2 means that even a penny packs a gigantic punch. See how much in this quiz.

This feature originally appeared on the site for the NOVA program Einstein's Big Idea.

Credits

Special Thanks

Michael Kelsey, Stanford Linear Accelerator Center
George Stephans, MIT

Photos

(atomic explosion)
Courtesy U.S. Department of Energy
(paper clip, New York skyline, light bulb)
© iStockphoto
(uranium ore, lump of coal)
Courtesy USGS/House Subcommittee on Energy and Natural Resources
(amoeba)
Courtesy Dr. Ralf Wagner/Wikimedia Commons
(Earth and sun from space)
Courtesy NASA
(solar flares, space shuttle launch)
Courtesy NASA/JPL
(penny)
Courtesy U.S. Mint
(Einstein's house)
Courtesy Dr. Y. S. Kim
(Earth from space)
Courtesy NASA
(flea)
Courtesy Wikimedia.org

Related Links

  • Einstein Quotes

    Seven thought-provoking statements from history's most famous scientist

  • Einstein the Nobody

    Just before his "miracle year" of 1905, the patent clerk's career prospects looked bleak.

  • The Elegant Universe: Pt 1

    Einstein's Dream: Combining the laws of the universe in one theory that explains it all is the Holy Grail of physics.

  • The Theory Behind the Equation

    Michio Kaku explores the eureka moment when Einstein came up with special relativity, the theory that spawned E = mc2.

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