# Abraham Lincoln - Will You Ever Give Up? by Loyd Uglow, Kennon James

By Loyd Uglow, Kennon James

From a log cabin to the White condo, stick with the lifetime of one in all America's such a lot favourite leaders. This inspiring account tells of ways ""Honest Abe"" overcame nice problems on his option to shaping a robust and unified state.

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Additional resources for Abraham Lincoln - Will You Ever Give Up?

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Bernoulli, this equation is one of the most basic tools for the analysis of flows. It states that if the internal velocity of the flow goes up, the internal pressure must drop. Therefore, the flow becomes more constricted if the velocity field within it increases. Another consequence of this equation is that 77 + \ W ) dt Δ 2 + y— - = constant ρ 1 (61) which is the equation for a streamline φ. This particular parametrization of the velocity in terms of a potential field is especially useful for inviscid flows, because the streamlines define the motion of thefluidand permit the use of analytical techniques (like complex analysis and conformal repre­ sentations) for solving the flow equations.

When a fluid is cooled so that it is almost solid, for instance, molten metal, it will behave like a plastic, moving differentially in the presence of walls and developing and 36 2. Viscosity and Diffusion supporting shearing. At the time, electromagnetic phenomena, especially light, were also of considerable interest. The analogy between waves and light, forcefully demonstrated by Young through the phenomenon of in­ terference, reinforced the belief that if light was transported through space, it must be through some medium capable of sustaining deformation and vibration.

Such motion is said to define a streamline. Then by using Eq. (14) we get for the equation of motion dVi ^ + Τ Ρ J dp Λ 7 _ dXj / =0 1 (59) dXi if there are no other body forces acting on the fluid. For a one-dimensional flow this becomes \v + — = constant 2 y-lp 2 (60) which is the definition of Bernoulli flow. Named in honor of D. Bernoulli, this equation is one of the most basic tools for the analysis of flows. It states that if the internal velocity of the flow goes up, the internal pressure must drop.