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
German resistance to Nazism Ludwig Kaas, the exiled leader of the German Catholic Zentrum party, in Rome, hoping to use the Pope as an intermediary to contact the British. Kaas put Müller in contact with Father Robert Leiber, who personally asked the Pope to relay the information about the German resistance to the British. The Vatican considered Müller to be a representative of Colonel-General von Beck and agreed to offer the machinery for mediation. Oster, Wilhelm Canaris and Hans von Dohnányi, backed by Beck, told Müller to ask Pius to ascertain whether the British would enter negotiations with the German opposition which wanted to