Force is a central concept in physics. By analysing the forces on an object, its resulting motion can be determined. But what exactly is a force? The word force is used in everyday language in a variety of contexts, only some of which reflect the scientific definition of force. In this video, people at Victoria Park in Sydney are interviewed on their ideas of force and the forces that act on them.
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Wednesday, 24 August 2011
Tuesday, 23 August 2011
Monday, 22 August 2011
Sunday, 21 August 2011
Reflection from an impedance discontinuity
Two segments of the Bell Labs apparatus are connected. The segments have different impedance. When a pulse travels from high impedance to low impedance, it is reflected with positive polarity and transmitted with positive polarity. When a pulse travels from low impedance to high impedance, it is reflected with negative polarity and transmitted with positive polarity.
Source: MIT TechTV
See other MIT physics demos
Source: MIT TechTV
See other MIT physics demos
Saturday, 20 August 2011
MIT 8.01 Classical Mechanics Lecture 23
MIT Physics Course
Professor Walter Lewin
Doppler effect, binary stars, x-ray binaries, neutron Stars and black holes
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