How taking a bath led to Archimedes' principle - Mark Salata

Dancing Raisins Listen Now Download as mp3 from the show Do Animals use Toilet Paper? What you Need What to do Gently pour the fizzy drink into your glass. Add a few raisins Watch... What may happen You should find that the raisins dance up and down for several minutes until the drink goes flat. Why does it happen? Fizzy drinks are fizzy because they have had a lot of carbon-dioxide (CO2) dissolved in them under pressure. This means that bubbles tend to form on the edges of the water, ie on the bottom of the glass, and on your raisin. Eventually the bubbles make the raisin float and it moves upwards to the surface, where some of the bubbles pop and the raisin sinks again. Dave Ansell Multimedia Related Content Just How Small Is an Atom? - Jonathan Bergmann Whether we’re zooming in to the wavelength of a gamma ray or zooming out to the size of a galaxy, it can be difficult to wrap our heads around the big numbers we’re measuring—like nanometers (10-9meters) or gigameters (109). Take a look at these efforts to represent big numbers. What are the strengths of each?

How Does A Gas Nozzle Know When To Shut Off? Given that there are plenty of liquids more dense than water, is it likely that the deepest crags of the ocean are filled with liquids other than water? : askscience