Centre of mass
In finite objects, the total external force equals the total mass times the acceleration of a point called the centre of mass.
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Uniform circular motion: angular displacement and velocity are introduced and centripetal acceleration is determined.
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The total work done on an object equals the increase in its kinetic energy. For conservative forces, we can define potential energy.
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A historical overview is presented of the experimental development of ever shorter laser pulses from 1960 to the present. Already in the early sixties nanosecond pulses were achieved and the entry into the picosecond domain was reached in the late s....
More details | Watch nowFrom Spinwaves to Giant Magnetoresistance (GMR) and Beyond
Standing spinwaves and surface waves in layered magnetic structures can be used for the detection and quantitative evaluation of interlayer exchange coupling (IEC). Using this method antiferromagnetic IEC has been found in Fe/Cr/Fe layered structure....
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On scales much bigger than the wavelength, rays explain the behaviour of interfaces, mirrors, lenses, optical instruments, including telescopes and microscopes.
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The inverse square law explains planetary motion - and apples falling. Newton's law, measuring G, calculating orbits.
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Sound is produced in the larynx; filtering it in the vocal tract produces formants and phonemes. The acoustics, mechanics and some neurobiology of hearing. Pitch perception.
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Superposing waves with different frequencies gives beats and Tartini tones. Removing beats gives consonance. Tuning consonances gives temperament.
More details | Watch nowIvar Giaever
Ivar Giaever won the Nobel Prize in 1973 for his investigations of tunneling in semiconductors and superconductors. Giaever worked on metal thin films and tunneling and took a Solid State physics course. Although he knew nothing about Superconductivi....
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Helen Sharman, the UK's first astronaut, gives a vibrant account of her personal experience of life in space using models and film to illustrate the key scientific concepts involved in spaceflight. Among other things she discusses the way Newton's Th....
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The discovery of superconductivity in hole doped La2CuO4 was motivated by the interest to find this phenomenon in an oxide. After the discovery near 35 K, copper oxides with transition temperatures of up to 131 K at normal pressure were found, i.e.....
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