shear of magnetic field
21Continuum mechanics — Continuum mechanics …
22Magnetohydrodynamics — For the academic journal, see Magnetohydrodynamics (journal). Magnetohydrodynamics (MHD) (magneto fluid dynamics or hydromagnetics) is an academic discipline which studies the dynamics of electrically conducting fluids. Examples of such fluids… …
23Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …
24Birefringence — Displacement of light rays with perpendicular polarization through a birefringent material …
25Large Plasma Device — The Large Plasma Device is an experimental physics device at UCLA. It is designed as a general purpose laboratory for experimental plasma physics research. The current version of the device began operation in 2001. The modern LaPD is operated as… …
26Viscosity — For other uses, see Viscosity (disambiguation). Viscosity The substance above has lower viscosity than the substance below SI symbol: μ, η SI unit: Pa·s  …
27Inner core — Earth cutaway from core to exosphere. Partially to scale. The inner core of the Earth, its innermost hottest part as detected by seismological studies, is a primarily solid ball about 1,220 km (760 mi) in radius,[1] …
28plate tectonics — plate tectonic, adj. Geol. a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past… …
29Defining equation (physics) — For common nomenclature of base quantities used in this article, see Physical quantity. For 4 vector modifications used in relativity, see Four vector. Very often defining equations are in the form of a constitutive equation, since parameters of… …
30Force — For other uses, see Force (disambiguation). See also: Forcing (disambiguation) Forces are also described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate …
