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  2. Buoyancy - Wikipedia

    en.wikipedia.org/wiki/Buoyancy

    Buoyancy (/ ˈ b ɔɪ ən s i, ˈ b uː j ən s i /), [1] [2] or upthrust is a net upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.

  3. Archimedes' principle - Wikipedia

    en.wikipedia.org/wiki/Archimedes'_principle

    Archimedes' principle, as stated above, equates the buoyant force to the weight of the fluid displaced. One common point of confusion [by whom?] regarding Archimedes' principle is the meaning of displaced volume. Common demonstrations involve measuring the rise in water level when an object floats on the surface in order to calculate the ...

  4. Neutral buoyancy - Wikipedia

    en.wikipedia.org/wiki/Neutral_buoyancy

    Balance of forces on objects with negative, neutral and positive buoyancy A neutrally buoyant diver does not need to fin to maintain depth. In scuba diving, the ability to maintain neutral buoyancy through controlled breathing, accurate weighting, and management of the buoyancy compensator is an important skill. A scuba diver maintains neutral ...

  5. Buoy - Wikipedia

    en.wikipedia.org/wiki/Buoy

    Race course marker buoys are used for buoy racing, the most prevalent form of yacht racing and power boat racing. They delimit the course and must be passed to a specified side.

  6. Cartesian diver - Wikipedia

    en.wikipedia.org/wiki/Cartesian_diver

    The experiment requires a large water-filled bottle, inside which is a "diver": a small, rigid tube, open at one end, very similar to an eyedropper with just enough air so that it is nearly neutrally buoyant, but still buoyant enough that it floats at the top while being almost completely submerged. Two alternative "divers" can be constructed.

  7. Bouncing ball - Wikipedia

    en.wikipedia.org/wiki/Bouncing_ball

    The buoyant force is usually small compared to the drag and Magnus forces and can often be neglected. However, in the case of a basketball, the buoyant force can amount to about 1.5% of the ball's weight. [20] Since buoyancy is directed upwards, it will act to increase the range and height of the ball.

  8. Buoyancy engine - Wikipedia

    en.wikipedia.org/wiki/Buoyancy_engine

    Diagram of how a Buoyancy Engine works. A buoyancy engine is a device that alters the buoyancy of a vehicle or object in order to either move it vertically, as in the case of underwater profiling floats and stealth buoys, or provide forward motion (therefore providing variable-buoyancy propulsion) such as with underwater gliders and some autonomous aircraft.

  9. Water vapor - Wikipedia

    en.wikipedia.org/wiki/Water_vapor

    Thus, any volume of dry air will sink if placed in a larger volume of moist air. Also, a volume of moist air will rise or be buoyant if placed in a larger region of dry air. As the temperature rises the proportion of water vapor in the air increases, and its buoyancy will increase.