Monthly Archives: July 2011

Passive Institutional Controls

The storage of nuclear waste is a long term problem, on the scale of tens of thou­sands of years.  Regular warning signs are no use on a times­cale this long: paper rots, metal rusts and paint peels. Changes in language … Continue reading

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How fast? The Doppler effect bumper sticker

There is a running joke amongst phys­i­cists about a bumper sticker than turns blue. This is a joke about the Doppler effect. When a source of waves are moving towards a detector (e.g. your ears or eyes) the fre­quency of the … Continue reading

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Solar wind and real wind

Solar wind” is a col­lo­quial term for the stream of charged particles ejected from the surface of the Sun by heat and strong magnetic fields. It is the inter­ac­tion between the solar wind and Earth’s magnetic field that is respons­ible … Continue reading

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Paperweight

I do not think the physics teacher respons­ible for this properly under­stands how paper­weights are supposed to work.

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Electricity consumption in the production of aluminium

Alu­minium is a very useful metal; it is the most widely used non-ferrous* metal in the world. It has a very low elec­trical res­ist­ance and a very good strength-to-weight ratio and has there­fore found many applic­a­tions: from pack­aging in drinks … Continue reading

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Revetments

In order to prevent excessive coastal erosion engin­eers often create revet­ments, struc­tures designed to absorb the energy of the incoming waves before they strike the coast. It seems to be the law that the pieces used to create these struc­tures … Continue reading

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Snow in the Atacama Desert

A con­vin­cing argument can be made that the Atacama Desert in Chile and Argen­tina is the driest place on Earth. The average rainfall is one mil­li­metre per year and some weather mon­it­oring stations have never detected rain. This week eighty … Continue reading

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How does SVK’s ultraviolet ink work?

SVK is a comic book written by Warren Ellis, drawn by Matt “D’Israeli” Brooker and pub­lished by BERG. SVK’s unique selling point is that it contains two “layers” of story: the regular, black and white layer, and a hidden layer, visible only … Continue reading

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Nobel prize winning sentences

To com­mem­orate the Lindau Nobel Meeting  —  a gath­ering of Nobel laur­eates held in Lindau, Germany  —  the Sci­entific American blog looked at “sentence[s] that … best rep­res­ents [laur­eates’] Nobel prize-winning work.” They mainly focused on the Physiology or Medicine and Chem­istry prizes and … Continue reading

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