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 and thereby strengthen the hand of Hitler's opponents in the Army. Weizsäcker also sent private messages to London urging resistance. The British and French were extremely doubtful of the ability of the German opposition to overthrow the Nazi regime and ignored these messages. An official of the British Foreign Office wrote on August 28, 1938: "We have had similar visits from other emissaries of the "Reichsheer", such as Dr. Goerdeler, but those for whom these emissaries claim to speak have never given us any reasons to suppose that they would be able or willing to take action such as would