Friction friction and wear in so-called self-lubricating materials. Fluid friction occurs between fluid layers that are moving relative to each other. This internal resistance to flow is named "viscosity". In everyday terms, the viscosity of a fluid is described as its "thickness". Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity. The less viscous the fluid, the greater its ease of deformation or movement. All real fluids (except superfluids) offer some resistance to shearing and therefore are viscous. For teaching and explanatory purposes it is helpful to use the concept of an inviscid fluid
From the Clouds to the Resistance From the Clouds to the Resistance From the Clouds to the Resistance (, literally "From the Cloud to the Resistance") is a 1979 Italian drama film directed by Danièle Huillet and Jean-Marie Straub. It competed in the Un Certain Regard section at the 1979 Cannes Film Festival. Philosophical conversations between mythological characters including Nephele/The Cloud (Olimpia Carlisi) and Issione/Ixion (Guido Lombardi), Ippòloco/Hippolochus (Gino Felici) and Sarpedonte/Sarpedon (Lori Pelosini), Edipo/Oedipus (Walter Pardini) and Tiresias (Ennio Lauricella), two hunters (Andrea Bacci and Lori Cavallini) discussing reincarnation of humans punished by the gods, Litierse/Lityerses and Eracle/Heracles (Francesco Ragusa and Fiorangelo Pucci), and a