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.
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