24 Jul '11, 6pm

OA not OK part 10: Is the ocean blowing bubbles? #skeptical

Isotopes are different forms of the same element that differ in the mass of the nucleus. You may have heard of uranium-235 and uranium-238. These are two (of the many) forms of uranium. The nucleus contains particles with a positive electric charge (protons) and particles with no electric charge (neutrons). Isotopes have the same number of protons but different numbers of neutrons. Mostly the properties of isotopes are the similar except for properties that depend on the mass of the atoms. For example, diffusion of a gas: A heavier gas diffuses more slowly than a lighter gas. This principle was used to separate uranium isotopes during the Second World War's atomic bomb programme, the Manhattan project.

Full article: http://www.skepticalscience.com/news.php?n=899


Profile: Dustin Johnson Part Olympic swimmer, p...

bunkershot.com 26 Jul '11, 2pm

Part Olympic swimmer, part NBA star, Dustin Johnson is built for speed and power, and it just might be the perfect combina...