News tagged with friction

Black hole jets

(PhysOrg.com) -- Black holes are irresistible sinks for matter and energy. They are so dense that not even light can escape from their gravitational clutches. Massive black holes (equal to millions or even ...

Jan 16, 2012 4.6 / 5 (7) 6 | with audio podcast

On the edge of friction

(PhysOrg.com) -- The problem exists on both a large and a small scale, and it even bothered the ancient Egyptians. However, although physicists have long had a good understanding of friction in things like ...

Dec 20, 2011 4.7 / 5 (6) 3 | with audio podcast

Bobsled runs -- fast and yet safe

Lightning fast, the sled bolts down the icy run. Will the team make it to the finish faster than their competitors? The tension in the crowd depends partly on the run itself: the faster the sleds can travel ...

Dec 01, 2011 4 / 5 (1) 1

New spin on friction-stir

(PhysOrg.com) -- Researchers Zhili Feng, Alan Frederic and Stan David in Oak Ridge National Laboratory's Materials S&T Division have made significant progress toward a new metal processing technique, called ...

Jul 26, 2011 5 / 5 (4) 1

Using magnets to help prevent heart attacks

If a person's blood becomes too thick it can damage blood vessels and increase the risk of heart attacks. But a Temple University physicist has discovered that he can thin the human blood by subjecting it to a magnetic field.

Jun 07, 2011 4.8 / 5 (6) 8 | with audio podcast