There, the particles of the hot gas had to travel farther, around 100,000 light-years, in order to interact with one another. That long journey allowed for the Chandra X-ray Observatory to probe ...

The gas particles in a box will create interesting patterns, or go back to the state in which they were when the experiment started. A similar theorem can be proved for quantum systems.

When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. The particles exert more force on the interior volume of the container.

Aerosol particles are crucially important to the chemistry of the atmosphere, influencing both climate and air quality. This Review discusses progress in understanding the radical-initiated ...

Trillions of these particles were emitted within just 20 minutes of boiling water or making grilled cheese sandwiches or buttermilk pancakes on a gas stove. Even though many particles rapidly diffused ...

Diffuse gas particles can behave in a way that contradicts a fundamental law of physics. Shutterstock / North10. Heat always spontaneously flows from a hotter place to a colder one ...

Occupational and Environmental Medicine, Vol. 58, No. 8 (Aug., 2001), pp. 511-516 (6 pages) Objectives—To measure the concentrations of particles less than 100 nm diameter and of oxides of nitrogen ...