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
Memorial to the German Resistance makes a particular point of demonstrating how Hitler exploited anti-Semitism to gain power and lead Germany to ruin. Graphic examples of Nazi anti-Semitic propaganda are displayed. The museum reproduces many official documents, newspapers, posters, illegal handbills, private letters and photographs: more than 5,000 individual items in all. Memorial to the German Resistance The German Resistance Memorial Center () is a memorial and museum in Berlin, capital of Germany. It was opened in 1980 in part of the Bendlerblock, a complex of offices in Stauffenbergstrasse (formerly Bendlerstrasse), south of the Großer Tiergarten in Tiergarten. It was here that Colonel Claus Schenk