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  2. Buoyancy - Wikipedia

    en.wikipedia.org/wiki/Buoyancy

    To find the force of buoyancy acting on the object when in air, using this particular information, this formula applies: Buoyancy force = weight of object in empty space − weight of object immersed in fluid. The final result would be measured in Newtons. Air's density is very small compared to most solids and liquids.

  3. Archimedes' principle - Wikipedia

    en.wikipedia.org/wiki/Archimedes'_principle

    To find the force of buoyancy acting on the object when in air, using this particular information, this formula applies: Buoyancy force = weight of object in empty space − weight of object immersed in fluid. The final result would be measured in Newtons. Air's density is very small compared to most solids and liquids.

  4. Brunt–Väisälä frequency - Wikipedia

    en.wikipedia.org/wiki/Brunt–Väisälä_frequency

    If the air parcel is pushed up and =, the air parcel will not move any further. If the air parcel is pushed up and N 2 < 0 {\displaystyle N^{2}<0} , (i.e. the Brunt–Väisälä frequency is imaginary), then the air parcel will rise and rise unless N 2 {\displaystyle N^{2}} becomes positive or zero again further up in the atmosphere.

  5. Displacement (fluid) - Wikipedia

    en.wikipedia.org/wiki/Displacement_(fluid)

    An object immersed in a liquid displaces an amount of fluid equal to the object's volume. Thus, buoyancy is expressed through Archimedes' principle, which states that the weight of the object is reduced by its volume multiplied by the density of the fluid. If the weight of the object is less than this displaced quantity, the object floats; if ...

  6. Boussinesq approximation (buoyancy) - Wikipedia

    en.wikipedia.org/wiki/Boussinesq_approximation...

    The Boussinesq approximation is inaccurate when the dimensionless density difference ⁠ Δρ / ρ ⁠ is approximately 1, i.e. Δρ ≈ ρ. For example, consider an open window in a warm room. The warm air inside is less dense than the cold air outside, which flows into the room and down towards the floor.

  7. Plume (fluid dynamics) - Wikipedia

    en.wikipedia.org/wiki/Plume_(fluid_dynamics)

    Several effects control the motion of the fluid, including momentum (inertia), diffusion and buoyancy (density differences). Pure jets and pure plumes define flows that are driven entirely by momentum and buoyancy effects, respectively. Flows between these two limits are usually described as forced plumes or buoyant jets.

  8. Stack effect - Wikipedia

    en.wikipedia.org/wiki/Stack_effect

    The stack effect or chimney effect is the movement of air into and out of buildings through unsealed openings, chimneys, flue-gas stacks, or other purposefully designed openings or containers, resulting from air buoyancy. Buoyancy occurs due to a difference in indoor-to-outdoor air density resulting from temperature and moisture differences ...

  9. Mass versus weight - Wikipedia

    en.wikipedia.org/wiki/Mass_versus_weight

    Normally, the effect of air buoyancy on objects of normal density is too small to be of any consequence in day-to-day activities. For instance, buoyancy's diminishing effect upon one's body weight (a relatively low-density object) is 1 ⁄ 860 that of gravity (for pure water it is about 1 ⁄ 770 that of gravity).