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  2. Q-Vectors - Wikipedia

    en.wikipedia.org/wiki/Q-Vectors

    Q-vectors can be determined wholly with: geopotential height and temperature on a constant pressure surface.Q-vectors always point in the direction of ascending air. For an idealized cyclone and anticyclone in the Northern Hemisphere (where <), cyclones have Q-vectors which point parallel to the thermal wind and anticyclones have Q-vectors that point antiparallel to the thermal wind

  3. Slider-crank linkage - Wikipedia

    en.wikipedia.org/wiki/Slider-crank_linkage

    For this reason, the in-line slider-crank mechanism produces balanced motion. This balanced motion implies other ideas as well. Assuming the crank arm is driven at a constant velocity, the time it takes to perform a forward stroke is equal to the time it takes to act a reverse stroke. The crank moves in only one direction, provided the position ...

  4. Variometer - Wikipedia

    en.wikipedia.org/wiki/Variometer

    Download as PDF; Printable version; In other projects ... and thus by constant practice so increase their knowledge ... and thus showed the vertical air motion ...

  5. Omega equation - Wikipedia

    en.wikipedia.org/wiki/Omega_equation

    The omega equation is a culminating result in synoptic-scale meteorology.It is an elliptic partial differential equation, named because its left-hand side produces an estimate of vertical velocity, customarily [1] expressed by symbol , in a pressure coordinate measuring height the atmosphere.

  6. Quasi-geostrophic equations - Wikipedia

    en.wikipedia.org/wiki/Quasi-geostrophic_equations

    While geostrophic motion refers to the wind that would result from an exact balance between the Coriolis force and horizontal pressure-gradient forces, [1] quasi-geostrophic (QG) motion refers to flows where the Coriolis force and pressure gradient forces are almost in balance, but with inertia also having an effect. [2]

  7. Euler's equations (rigid body dynamics) - Wikipedia

    en.wikipedia.org/wiki/Euler's_equations_(rigid...

    In an inertial frame of reference (subscripted "in"), Euler's second law states that the time derivative of the angular momentum L equals the applied torque: = For point particles such that the internal forces are central forces, this may be derived using Newton's second law.

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  9. Tautochrone curve - Wikipedia

    en.wikipedia.org/wiki/Tautochrone_curve

    The tautochrone problem is a special case of Abel's mechanical problem when () is a constant. Abel's solution begins with the principle of conservation of energy – since the particle is frictionless, and thus loses no energy to heat , its kinetic energy at any point is exactly equal to the difference in gravitational potential energy from its ...