Why is Perpetual Motion Considered to be Impossible? Classically such a device would be a 'machine' that could produce its own motion without (additional) external input. In order to start up, work has to be done in order to start the initial motion, which in turn requires an 'input' of external energy! This energy would rapidly dissipate due to the effect(s) of (thermal) entropy. (release of excess energy...) As such, in order to sustain the energy gained from the initial input in order to maintain the motion obtained from it, such an apparatus (in this case) must be placed in an environment where (thermal) entropy is 'zero'. In order to obtain 'zero' entropy, one must have an environment where temperature (T) is also zero!
At T=0, all fundamental particles retain an intrinsic energy known as the ground state, or 'zero-point energy' which is the lowest energy state particles may have. The only way to replace this loss of energy is by providing more energy to the system (or apparatus), which in turn requires more input. Fermilab | Home. Physics and Astronomy Departments in USA. 'Science is facts; just as houses are made of stones, so is science made of facts; but a pile of stones is not a house and a collection of facts is not necessarily science.' Henri Poincaré(1854-1912) 10 Ways to Keep Your Kids Interested In Science Young children are natural scientists: they ask questions, pick up sticks and bugs outside, and are curious about the world around them.
But as they get a bit older, many kids gradually lose their interest in science. They might see it as just another task at school, something that doesn't apply to their lives. Here are our physics & astronomy bestsellers: 12 inch Galileo Thermometer Weather Station 4M Kit Solar Radiometer 3D Magnetic Field Tube Cricket, Locust, Beetle and Crab Clean Water Science 4M Kit 130 Electronics Projects Kit Revolving Multi-Color Fiberoptic Light Solar Science 4M Kit Space Wonder Gyroscope. Chandra: Video Podcasts: Standard Definition. The Feynman Lectures on Physics Website. Teleportation.
Teleportation is the name given by science fiction writers to the feat of making an object or person disintegrate in one place while a perfect replica appears somewhere else. How this is accomplished is usually not explained in detail, but the general idea seems to be that the original object is scanned in such a way as to extract all the information from it, then this information is transmitted to the receiving location and used to construct the replica, not necessarily from the actual material of the original, but perhaps from atoms of the same kinds, arranged in exactly the same pattern as the original. A teleportation machine would be like a fax machine, except that it would work on 3-dimensional objects as well as documents, it would produce an exact copy rather than an approximate facsimile, and it would destroy the original in the process of scanning it.
In 1993 an international group of six scientists, including IBM Fellow Charles H. C.H. Bennett, G. Brassard, C. Crepeau, R. Physics 20b: Introduction to Cosmology - Spring 2010 - Download free content from UC Irvine on iTunes - StumbleUpon. Sonoluminescence - Wikipedia, the free encyclopedia - StumbleUpon. Single-bubble sonoluminescence - A single, cavitating bubble. Video of synthetic wound cavity collapsing creating sonoluminescence.
Long exposure image of multi-bubble sonoluminescence created by a high-intensity ultrasonic horn immersed in a beaker of liquid History[edit] The sonoluminescence effect was first discovered at the University of Cologne in 1934 as a result of work on sonar. In 1989 an experimental advance was introduced by Felipe Gaitan and Lawrence Crum, who produced stable single-bubble sonoluminescence (SBSL). Properties[edit] Sonoluminescence can occur when a sound wave of sufficient intensity induces a gaseous cavity within a liquid to collapse quickly. Some facts about sonoluminescence: Rayleigh–Plesset equation[edit] The dynamics of the motion of the bubble is characterized to a first approximation by the Rayleigh-Plesset equation (named after Lord Rayleigh and Milton Plesset): Mechanism of phenomenon[edit] In 2002, M. Other proposals[edit] Quantum explanations[edit] [edit]