Premium Only Content

Liquid Ping Pong in Space
NASA astronaut Scott Kelly, who marked day 300 of a historic year in space on Jan. 21, 2016, shows off another fascinating feature of life in microgravity. Kelly used two paddles with hydrophobic, or water repellant, features to pass a sphere of water back and forth. Scientists use the microgravity environment of the space station to advance scientific knowledge in Earth, space, physical, and biological sciences that otherwise wouldn't be possible down here on the planet.
The paddles are polycarbonate laser etched so that the surfaces are actually arrays of 300 micrometer posts (0.3mm). The surfaces were then spray coated with a Teflon coat. The combined effects of surface roughness and non-wettability produce a super-hydrophobic surface capable of preventing water adhesion in dynamic processes. The larger the drop, the less force it takes to break it up. The smaller the drop, the harder you can hit it. Scott is demonstrating about a 4 mL drop (over 100 times larger than a rain drop).
-
57:48
The Rubin Report
2 hours agoListen to ‘The View’s’ Sunny Hostin Accidentally Reveal How Ignorant She Is
21.5K21 -
LIVE
TheDigitalChamber
3 days agoDC Blockchain Summit 2025 - Livestream
3,579 watching -
LIVE
House Committee on Energy and Commerce
23 hours agoCMT Subcommittee Hearing: The World Wild Web: Examining Harms Online
338 watching -
LIVE
Omar Elattar
15 hours ago“I Made $100+ Million In One Day! — Meet the High School Dropout Who Took One Risk & Won Big”
147 watching -
59:33
VINCE
4 hours agoPresident Trump Joins The Show | Episode 08 - 03/26/25
294K384 -
LIVE
LFA TV
17 hours agoFULL BLOWN PANIC! | LIVE FROM AMERICA 3.26.25 11AM
3,751 watching -
50:46
MYLUNCHBREAK CHANNEL PAGE
16 hours agoAirships, Lies, and Buried Truths
79.3K8 -
1:33:52
Caleb Hammer
20 hours ago120 Years To Fix This… | Financial Audit
39.2K3 -
53:44
Dad Dojo Podcast
13 hours ago $0.87 earnedEP25: Cain Velasquez Sentence Reaction
30.2K -
1:07:32
BonginoReport
7 hours agoConservatism, Faith, and the Future of MAGA with Vince Coglianese-Early Edition (Ep.168)-03/26/2025
156K91