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SUMMARY:Charmed chains\, missing energy\, mechanics\, and the first teleco
 mmunications revolution - Professor Mark Warner (Cavendish Laboratory\, Ca
 mbridge University)
DTSTART:20141015T190000Z
DTEND:20141015T200000Z
UID:TALK55413@talks.cam.ac.uk
CONTACT:Nicolas Bricknell
DESCRIPTION:Professor Mark Warner gives a talk about the questions raised 
 by so-called "charmed chains": https://www.youtube.com/watch?v=_dQJBBklpQQ
  - see the abstract below for more details.\n\nFor this talk\, admission i
 s free to everyone. As always\, wine and cheese will be served after the t
 alk.\n\n\n(Abstract:)\nEven after 350 years\, classical mechanics shocks b
 oth physicists and laymen.  In weeks\, several million viewed Mould's disc
 overy that a siphoned chain rises liked a charmed snake.  Physics explanat
 ions abounded\, all apparently wrong! Equally disturbing are chains fallin
 g with an acceleration greater than g.\n\nBernoulli\, Leibnitz and Huygens
  first described a hanging chain\, the catenary\, while Hooke used it inve
 rted as an ideal arch.  Moving chains have worried Cambridge Mathematician
 s and Physicists since the 1850s: the Astronomer Royal\, George Airy\, pub
 lished on them\, stimulated by the first telecommunications revolution\; t
 he 1854 Maths Tripos had questions on them. But such chains should not ris
 e like a snake\, nor fall faster than g! We pursue this deficiency in clas
 sical dynamics with theory\, demonstrations and films: can pasta be thus c
 harmed\, what about fishing weights on a line?
LOCATION:Pharmacology Lecture Theatre\, Tennis Court Road
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