Shear flow themselves. In a shearing flow, adjacent layers of fluid move parallel to each other with different speeds. Viscous fluids resist this shearing motion. For a Newtonian fluid, the stress exerted by the fluid in resistance to the shear is proportional to the strain rate or shear rate. A simple example of a shear flow is Couette flow, in which a fluid is trapped between two large parallel plates, and one plate is moved with some relative velocity to the other. Here, the strain rate is simply the relative velocity divided by the distance between the plates. Shear flows in fluids
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