In a transparent medium, each photon is accompanied by an atomic mass density wave, scientists can demonstrate. The optical force of the photon sets the medium atoms in motion and makes them carry 92% ...

It is tempting to think that some materials are always heavier than other materials. For example, someone might say that metal is heavier than air. But it depends on how much of each material there is ...

Vol. 378, No. 2172, Theme issue: Advanced materials modelling via fractional calculus: challenges and perspectives (29 May 2020), pp. 1-16 (16 pages) This paper reports the application of cellular ...

The amount of space debris has increased steadily since the launch of Sputnik in 1957, and about 22,000 man-made objects that are 10 cm or larger in diameter are currently cataloged and tracked in low ...

Density describes how closely packed the particles are in a solid, liquid or gas. in a solid ‐ particles are tightly packed in a regular structure in a liquid ‐ particles are tightly packed but free ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...