Metallic glasses, for example, are typically well described by the dense random packing of hard spheres.

For our potential we have therefore , in other words the scattering length for a hard sphere is just the radius.

It was a simulation of 12 hard spheres using a Monte Carlo algorithm.

This means that the gas molecules really are not hard spheres at that temperature.

He said to the hard, small sphere in his hand.

It was May; the trees were in full leaf now, their branches spot ted with hard green spheres that would become apples in the month, ahead.

This can result in effective forces even between hard spheres.

She stuck her hand in her holdall and felt for the smooth, hard sphere.

For hard spheres, the equation has an analytical solution.

It has collected itself together, it's a hard sphere, it does not have time right now to listen to her.