| | What is time? | | Ideas about time have changed dramatically in the 20th century. At the beginning of the century time was viewed as Newton's universal, absolute, mathematical time. There had been remarkable progress towards more and more accurate measurement and at... | |
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| | E=mc2 | | In physics, E= mc2 is an important and well-known equation, which states an equivalence between energy (E) and mass (m), in direct proportion to the square of the speed of light in a vacuum (c2). Many other definitions of mass in other ways may be... | |
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| Do you have a poor grasp of time? | | They say there are four dimensions (that we know of): X, Y, Z and time. I have such a poor grasp of all of them, it's frightening. I bump into furniture all the time. I get lost through the streets if I don't bring a little map along with me. And I... | |
| | Think Like Einstein | | Ever since Einstein revealed his special theory of relativity,we 've known that time travel-at least moving forward through time - is possible.Einstein didn't pull this theory,or even the notion that time travel is possible,out of the air.Rather he... | |
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