MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 07: Weight and Weightlessness
This lecture explores weight, perceived gravity, weightlessness, free fall, zero perceived gravity in orbit.
via Yovisto / Osotis
MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 08: Friction
This lecture deals exclusively with frictional forces.
Prof. Lewin demonstrates a strange experiment, where a flea is moving a thick book.
via Yovisto / Osotis
If a perfectly diffuse, perfectly reflecting surface has one foot-candle (one lumen per square foot) of illumination falling on it, its luminance is one foot-Lambert or 1/pi candles per square foot.
Abstract: A recent analysis of a Lunar Laser Ranging (LLR) data record spanning 38.7 yr revealed an anomalous increase of the eccentricity of the lunar orbit amounting to de/dt_meas = (9 +/- 3) 10^-12 yr^-1.
Once again, astronauts on the International Space Station dissolved an effervescent tablet in a floating ball of water, and captured images using a camera ca...
Full-time researcher in cosmology. Before graduating I learned that the speed of light is slowing down and came up with the GM=tc^3 equation, which most physicists still can't explain. More recent work seeks Black Holes in some very unexpected places. I e
On September 22, 1791, the famous chemist and physicist Michael Faraday was born. He is responsible for the discovery of the electromagnetic induction, the laws of electrolysis and best known for his inventions, which laid the foundations to the electrical industry.
Today for us it's pretty normal that electricity can be transmitted on a wire, because it's part of our daily life. But, in the early 18th century, when the English nature-scientist Stephen Gray was able to show that electricity really can be transmitted on a string of copper, it was an unheard-of revelation.
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HEPNames attempts to be a comprehensive directory of people involved in High-Energy Physics and related fields. We compile information from numerous sources, primarily laboratory directories and user supplied information. If you have some concerns about information on your record, see the "corrections" link on the right, or email us at hepnames@slac.stanford.edu.
- Special Relativity
- Quantum Theory
- Quantum Mechanics
- Quantum-Mechanical Theory of Atoms
- Chemical Bonds and Solid-State Physics
- Nuclear Physics
- Particle Physics
On December 19, 1859, US-american physicist Albert Abraham Michelson was born. Together with his colleague Edward Williams Morley he conducted an experiment that proved the by the time famous ether theory to be wrong and is considered to be one of the pilars of the theory of relativity.
On March 14, 1879, German theoretical physicist Albert Einstein was born, who has become an iconic figure for physics as well as science of the 20th century. He is best known for his theories on special and general relativity, as well as for the discovery of the photoelectric effect - for which he received the Nobel Prize - and he developed what has been named the most famous equation in history, the mass energy equivalence. Of course our history of science and technology (and art) blog wouldn't be complete without mentioning Albert Einstein's birthday. We already had several articles mentioning Einsteins work (The annus mirabilis 1905) or influence (relativity theory, nuclear fission, quantum physics, etc.). Thus, it is high time to take a closer look at the life of the most prominent scientist ever that has even become a popular icon.
On March 20, 1800, Italian physicist Alessandro Volta informed the British Royal Society in London about his newly invented electric power source, the Voltaic pile, the first energy source technology capable of producing a steady, continuous flow of electricity.
Welcome to PhilSci-Archive, an electronic archive for preprints in the philosophy of science. It is offered as a free service to the philosophy of science community. The goal of the archive is to promote communication in the field by the rapid dissemination of new work. PhilSci-Archive invites submissions in all areas of philosophy of science, including general philosophy of science, philosophy of particular sciences (physics, biology, chemistry, psychology, etc.), feminist philosophy of science, socially relevant philosophy of science, history and philosophy of science and history of the philosophy of science.
There are generally two types of science: first, there’s the type that makes computers work, allows us to ride around in metal boxes propelled by continuous explosion, and makes it so that milk doesn’t taste all gross. Then there’s the fringe science, the stuff that shoots up your nose like mathematical horseradish and dances a jig on your brain