Access
To read this story in full you will need to login or make a payment (see right).
Brief Communications
Nature 416, 385-386 (28 March 2002) | doi:10.1038/416385a
Open Innovation Challenges
-
Optimizing Sub-cellular Localization Tags
The Seeker is looking for methods to optimize sub-cellular localization tags for protein expression....
-
Novel Approaches to Protecting Maize from Insect Damage
The Seeker is looking for novel approaches to protecting maize from insect damage. This Challenge re...
- More Challenges
- Powered by:
nature jobs
Instrumentation Engineer
- Praj Matrix - Praj Industries Ltd
- Pune, Maharashtra Pune-411021 India
Assistant Professor
- University of Texas
- Austin TX United States
Classical dynamics: Spinning eggs — a paradox resolved
H. K. Moffatt1 & Y. Shimomura2
Abstract
If a hard-boiled egg is spun sufficiently rapidly on a table with its axis of symmetry horizontal, this axis will rise from the horizontal to the vertical. (A raw egg, by contrast, when similarly spun, will not rise.) Conversely, if an oblate spheroid is spun sufficiently rapidly with its axis of symmetry vertical, it will rise and spin about the vertical on its rounded edge with its axis of symmetry now rotating in a horizontal plane. In both cases, the centre of gravity rises; here we provide an explanation for this paradoxical behaviour, through derivation of a first-order differential equation for the inclination of the axis of symmetry.
To read this story in full you will need to login or make a payment (see right).
