Particles - molecules or ions - in a liquid and a gas are constantly moving randomly. Because of this movement, particles will spread themselves evenly throughout. Diffusion is one of the processes ...

Mohammad Hafezi, a Joint Quantum Institute Fellow, and his colleagues investigated how changing the ratio of fermionic to ...

Solids, liquids and gases. In a solid like this brick, the particles are regularly arranged touching their neighbours and move only by vibrating. This explains why solids have a fixed shape. In a ...