Science Daily: Uranus
- NASA's Hubble, New Horizons team up for a simultaneous look at Uranus October 11, 2024
- Key to rapid planet formation August 1, 2024
Oobleck is actually more than just a made-up name for the stuff in the Dr. Seuss book, it’s the name now applied to a whole class of fluids which display what is called "shear thickening." That just means that when they have a sudden force applied, include of splashing to the side, the perversely get thicker and harder. It’s the topic of this month’s feature article in Physics Today and admittedly had nothing to do with astronomy. But hey, the featured YouTube video lets you skip through all the technical parts of the article and see what the effect really is (scroll to the bottom of the Physics Today article).
Apart from making for funny videos, what is such an effect good for? Well, buried in the middle of the article is a note about the potential for soft armor. A test batch of Kevlar formulated with one type of polymer colloids boosted Kevlars strenght by 50%. Another formulated with silica colloics boosted it by 150%; that means the test "bullet," a quarter-inch round steel ball had to travel 100 meters/second to penetrate the regular material now had to travel 250 meters/second.There are some images and video of the tests at the University of Delaware’s Shear Thickening Fluid lab.
I do have to say that silly game show videos aside, I wouldn’t recommend filling a pool with the stuff with small children around; the consistency is like a thick quicksand and is potentially just as dangerous. And even though you can make it from just water and starch, I’m not quite sure how to dispose of the stuff when you’re all done….
Written by Roland Roberts
Search
.Archives
- October 2024 (1)
- May 2024 (2)
- April 2024 (3)
- September 2022 (5)
- April 2022 (1)
- January 2022 (3)
- December 2021 (4)
- September 2021 (3)
- July 2021 (1)
- January 2021 (1)
- November 2020 (2)
- October 2020 (2)
- September 2020 (2)
- August 2020 (5)
- July 2020 (1)
- November 2019 (2)
- September 2019 (1)
- August 2019 (2)
- September 2017 (1)
- August 2017 (1)
- September 2015 (3)
- August 2015 (2)
- June 2015 (5)
- May 2015 (3)
- May 2013 (2)
- January 2013 (1)
- December 2012 (2)
- September 2012 (1)
- June 2012 (1)
- May 2012 (1)
- October 2011 (2)
- September 2011 (2)
- April 2011 (2)
- March 2011 (10)
- January 2011 (8)
- November 2010 (2)
- October 2010 (1)
- September 2010 (3)
- August 2010 (2)
- July 2010 (1)
- June 2010 (1)
- April 2010 (3)
- February 2010 (3)
- January 2010 (3)
- December 2009 (6)
- November 2009 (3)
- October 2009 (7)
- September 2009 (8)
- August 2009 (4)
- July 2009 (1)
- June 2009 (2)
- May 2009 (2)
- April 2009 (7)
- March 2009 (1)
- February 2009 (6)
- January 2009 (4)
- December 2008 (4)
- November 2008 (3)
- October 2008 (11)
- September 2008 (4)
- August 2008 (5)
- July 2008 (5)
- June 2008 (2)
- April 2008 (4)
- March 2008 (18)
- February 2008 (9)
- November 2007 (1)
- October 2007 (3)
- July 2007 (3)
- April 2007 (1)
- March 2007 (6)
- February 2007 (3)
- December 2006 (3)
- October 2006 (4)
- September 2006 (1)
- July 2006 (5)
- May 2006 (10)
- April 2006 (9)