News tagged with friction

Engineers Assess Dawn's Reaction Wheel

(PhysOrg.com) -- Engineers are studying the reaction wheels on NASA's Dawn spacecraft after automatic sensors detected excess friction building up in one of them and powered it off early on the morning of ...

Jun 30, 2010
4 / 5 (3) 0

A crack in the case for supersolids

New experiments are casting doubt on previously reported observations of supersolid helium. In a paper appearing in the current issue of Physical Review Letters, John Reppy (Cornell University) presents research suggesting that p ...

Jun 21, 2010
4.3 / 5 (4) 0

Simple Robot Climbs Through Tubes (w/ Video)

Last week was the IEEE's International Conference on Robotics and Automation, held in Anchorage, Alaska. One of the most interesting robots was a simple -- and fast -- bot designed to climb easily through tubes.

May 12, 2010 weblog
4.6 / 5 (9) 2 | with audio podcast

Washington state moves to ban copper in brake pads

(AP) -- When a driver hits the brakes, friction releases copper shavings that fall onto the road and are eventually washed into rivers, where environmentalists say the metal could pose a hazard to marine life - especially ...

Apr 12, 2010
3.7 / 5 (6) 1

Frictionless supersolid a step closer

Superfluid mixtures of atoms can boil and freeze at ultra-low temperatures. This freezing can result in the formation of supersolids of atoms that can flow alongside each other without friction, but are still set in a fixed ...

Feb 14, 2010
4 / 5 (2) 6