Join 3,411 readers in helping fund MetaFilter (Hide)

6 posts tagged with water and chemistry. (View popular tags)
Displaying 1 through 6 of 6. Subscribe:

The Leidenfrost Maze

When a liquid is dropped onto a smooth plate that is heated to a specific temperature well above its boiling point, boiled vapor will get trapped underneath the remainder of the droplet insulating it from the hot plate, allowing it to dance around the plate like oil on a wet surface in what is known as the Leidenfrost effect. Intriguingly, surfaces that are grooved into the shape of a saw blade will cause droplets suspended by the Leidenfrost effect to predictably skitter in the direction of the groove, allowing University of Bath undergraduate students Carmen Cheng and Matthew Guy to build a fascinating maze. [more inside]
posted by Blasdelb on Oct 2, 2013 - 32 comments

Is It Moist On Mars?

New report suggests Mars may be full of liquid water - Smithsonianmag.com
posted by The Whelk on Jun 26, 2012 - 77 comments

Oh Look It's The Hangover Ham!

Atlantic Wire: Science's Best Hangiver Cures [more inside]
posted by The Whelk on Jan 1, 2012 - 72 comments

Reservoir ball pit

For millennia, man has yearned to block the sun (with black plastic balls). If an un-covered public water reservoir contains bromide, sunlight will combine the bromide with the chlorine used for reducing bacteria -- thus poisoning the water with carcinogenic bromate. Blocking the sunlight is the answer, but building a permanent cover for a huge reservoir is very costly. The solution for LA-area reservoirs, a few years ago: cover the entire water surface with millions of floating "bird balls", in effect turning the reservoir into a 10+ acre ball pit. [more inside]
posted by LobsterMitten on Oct 30, 2011 - 46 comments

Do Not Try This At Home

You can see that things gradually become more terrifying : Five of the six alkali metals and their reactions to air and water. Learn more at the Periodic Table Of Videos. Lithium, Sodium, Potassium, Rubidium, Cesium (Caesium), and the elusive Francium.
posted by The Whelk on Nov 18, 2009 - 29 comments

Where's the EPA on this?

Where's the EPA on this? Apparently, this stuff is everywhere, but I haven't heard one word on its dangers until now. Christine Whitman, be slient no longer!
posted by jpoulos on Jun 22, 2001 - 15 comments

Page: 1