Browse Physics

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41.

Focus

Elastomers Make Light Work

Phys. Rev. Focus 7, 32 (2001) – Published June 29, 2001

A new material stretches and contracts in response to light.

42.

Focus

Foamy Flows

Phys. Rev. Focus 7, 22 (2001) – Published May 14, 2001

A comparison of foams made with two different gases supports a theory on how foam changes over time.

43.

Focus

Flexibility of Cell Membranes

Phys. Rev. Focus 7, 9 (2001) – Published February 23, 2001

A new technique measures the mechanical properties of cell membranes by watching the motion of small beads attached to 20-micrometer-diameter bubbles of membrane surrounded by a layer of protein.

44.

Focus

Anatomy of a Jam

Phys. Rev. Focus 6, 29 (2000) – Published December 27, 2000

In the first quantitative study of the jamming of grain hoppers, a team derived a mathematical model that could lead to improved hopper designs.

45.

Focus

Why Like Charges Attract

Phys. Rev. Focus 6, 25 (2000) – Published December 6, 2000

Two negatively charged beads near a wall in water can attract one another. This surprising result may in some cases be explained by the fluid flow created as they are repelled by the wall.

46.

Focus

Toothpaste Is a Glass

Phys. Rev. Focus 6, 24 (2000) – Published November 28, 2000

The puzzling properties of toothpaste-like materials make sense, based on new experiments showing that pastes have much in common with glasses–disordered materials that physicists have been studying for many years.

47.

Focus

An Ideal Gas of Beads

Phys. Rev. Focus 6, 16 (2000) – Published October 10, 2000

A set of violently shaken beads exhibits a velocity distribution similar to that of an ideal gas, regardless of the shaking speed, suggesting that a fundamental theory of granular materials may be possible.

48.

Focus

Building the Devil’s Staircase

Phys. Rev. Focus 5, 10 (2000) – Published March 7, 2000

A drop of soapy molecules and water can form a rigid gel crystal that displays more facets than any crystal ever observed–a phenomenon called ‘the Devil’s staircase.’

49.

Focus