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  2. Keynesian cross - Wikipedia

    en.wikipedia.org/wiki/Keynesian_cross

    The 45-degree line represents an aggregate supply curve which embodies the idea that, as long as the economy is operating at less than full employment, anything demanded will be supplied. Aggregate expenditure and aggregate income are measured by dividing the money value of all goods produced in the economy in a given year by a price index.

  3. Ekman spiral - Wikipedia

    en.wikipedia.org/wiki/Ekman_spiral

    So if the layer thickness is small, because of a small viscosity of the fluid for example, this component could be very large. At last, the flow at the surface is 45 degrees to the right on the northern hemisphere and 45 degrees to the left on the southern hemisphere with respect to the wind-direction. In case of the bottom Ekman spiral, this ...

  4. Coordination failure (economics) - Wikipedia

    en.wikipedia.org/wiki/Coordination_failure...

    The curve represents possible output decisions for the individual firm, and it intersects with the 45 degree line at three points, meaning there are three equilibria. If the firm and society are better off with more output, point B is most desirable. However, the firm's production is determined by what the other firms decide.

  5. Lorenz curve - Wikipedia

    en.wikipedia.org/wiki/Lorenz_curve

    The Lorenz curve cannot rise above the line of perfect equality. A Lorenz curve that never falls beneath a second Lorenz curve and at least once runs above it, has Lorenz dominance over the second one. [5] If the variable being measured cannot take negative values, the Lorenz curve: cannot sink below the line of perfect inequality, is increasing.

  6. Catenary - Wikipedia

    en.wikipedia.org/wiki/Catenary

    A chain hanging from points forms a catenary. The silk on a spider's web forming multiple elastic catenaries.. In physics and geometry, a catenary (US: / ˈ k æ t ən ɛr i / KAT-ən-err-ee, UK: / k ə ˈ t iː n ər i / kə-TEE-nər-ee) is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends in a uniform gravitational field.

  7. Aerobatic maneuver - Wikipedia

    en.wikipedia.org/wiki/Aerobatic_maneuver

    5/8s of a loop to the 45 degree line, 1/2 roll,3/4s of a loop to the 45 degree line, 1/2 roll, 1/8s of a loop to level flight (half of the Cuban Eight is called a "half Cuban Eight", and the figure can be flown backwards, known as a "Reverse Cuban Eight"). Half Cuban Eight

  8. Horizontal coordinate system - Wikipedia

    en.wikipedia.org/wiki/Horizontal_coordinate_system

    Azimuth is measured eastward from the north point (sometimes from the south point) of the horizon; altitude is the angle above the horizon. The horizontal coordinate system is a celestial coordinate system that uses the observer's local horizon as the fundamental plane to define two angles of a spherical coordinate system: altitude and azimuth.

  9. Lifting-line theory - Wikipedia

    en.wikipedia.org/wiki/Lifting-line_theory

    The Lanchester-Prandtl lifting-line theory [1] is a mathematical model in aerodynamics that predicts lift distribution over a three-dimensional wing from the wing's geometry. [2] The theory was expressed independently [ 3 ] by Frederick W. Lanchester in 1907, [ 4 ] and by Ludwig Prandtl in 1918–1919 [ 5 ] after working with Albert Betz and ...