释义 |
buoyancy
buoy·an·cy B0554900 (boi′ən-sē, bo͞o′yən-)n.1. a. The tendency or capacity to remain afloat in a liquid or rise in air or gas.b. The upward force that a fluid exerts on an object less dense than itself.2. Ability to recover quickly from setbacks; resilience.3. Lightness of spirit; cheerfulness.buoyancy (ˈbɔɪənsɪ) n1. the ability to float in a liquid or to rise in a fluid2. (General Physics) the property of a fluid to exert an upward force (upthrust) on a body that is wholly or partly submerged in it3. the ability to recover quickly after setbacks; resilience4. cheerfulnessbuoy•an•cy (ˈbɔɪ ən si, ˈbu yən si) also buoy′ance, n. 1. the power to float or rise in a fluid; relative lightness. 2. the power of supporting a body so that it floats; upward pressure exerted by the fluid in which a body is immersed. 3. lightness of spirit. [1705–15] buoy·an·cy (boi′ən-sē) The upward force that a fluid exerts on an object that is less dense than itself. Buoyancy allows a boat to float on water.buoyancyThe upthrust (upward force) on a body placed in a fluid.ThesaurusNoun | 1. | buoyancy - cheerfulness that bubbles to the surfaceperkinessblitheness, cheerfulness - a feeling of spontaneous good spirits; "his cheerfulness made everyone feel better" | | 2. | buoyancy - the property of something weightless and insubstantialairinessweightlessness, lightness - the property of being comparatively small in weight; "the lightness of balsa wood" | | 3. | buoyancy - the tendency to float in water or other liquidtendency, inclination - a characteristic likelihood of or natural disposition toward a certain condition or character or effect; "the alkaline inclination of the local waters"; "fabric with a tendency to shrink" | | 4. | buoyancy - irrepressible liveliness and good spirit; "I admired his buoyancy and persistent good humor"irrepressibilitysprightliness, liveliness, spirit, life - animation and energy in action or expression; "it was a heavy play and the actors tried in vain to give life to it" |
buoyancynoun1. floatability, lightness, weightlessness Air can be pumped into the diving suit to increase buoyancy.2. cheerfulness, bounce (informal), pep, animation, good humour, high spirits, zing (informal), liveliness, spiritedness, cheeriness, sunniness a mood of buoyancy and optimism3. expansion, development, strength, mushrooming, economic growth The slump will be followed by a period of buoyancy.buoyancynounThe ability to recover quickly from depression or discouragement:bounce, elasticity, resilience, resiliency.Translationsbuoy (boi) , ((American) ˈbu:i) noun a floating anchored mark, acting as a guide, warning or mooring point for boats. 浮標 浮标 see also lifebuoy. ˈbuoyancy noun the ability to float on water or in the air. the buoyancy of a balloon. 浮力 浮力ˈbuoyant adjective 有浮力的 有浮力的buoyancy
buoyancy (boi`ənsē, bo͞o`yən–), upward force exerted by a fluid on any body immersed in it. Buoyant force can be explained in terms of Archimedes' principleArchimedes' principle, principle that states that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid. The principle applies to both floating and submerged bodies and to all fluids, i.e., liquids and gases. ..... Click the link for more information. .Buoyancy The resultant vertical force exerted on a body by a static fluid in which it is submerged or floating. The buoyant force FB acts vertically upward, in opposition to the gravitational force that causes it. Its magnitude is equal to the weight of fluid displaced, and its line of action is through the centroid of the displaced volume, which is known as the center of buoyancy. See Aerostatics, Hydrostatics By weighing an object when it is suspended in two different fluids of known specific weight, the volume and weight of the solid may be determined. See Archimedes' principle Another form of buoyancy, called horizontal buoyancy, is experienced by models tested in wind or water tunnels. Horizontal buoyancy results from variations in static pressure along the test section, producing a drag in closed test sections and a thrust force in open sections. These extraneous forces must be subtracted from data as a boundary correction. Wind tunnel test sections usually diverge slightly in a downstream direction to provide some correction for horizontal buoyancy. A body floating on a static fluid has vertical stability. A small upward displacement decreases the volume of fluid displaced, hence decreasing the buoyant force and leaving an unbalanced force tending to return the body to its original position. Similarly, a small downward displacement results in a greater buoyant force, which causes an unbalanced upward force. A body has rotational stability when a small angular displacement sets up a restoring couple that tends to return the body to its original position. When the center of gravity of the floating body is lower than its center of buoyancy, it will always have rotational stability. Many a floating body, such as a ship, has its center of gravity above its center of buoyancy. Whether such an object is rotationally stable depends upon the shape of the body. Buoyancy of a ship, the ability of a loaded ship to float in a designated position relative to the water’s surface; one of the most important features of a ship’s seaworthiness. To ensure safe operation, every vessel must have reserve buoyancy, defined as the additional weight a ship can carry and still remain afloat. Reserve buoyancy is determined by the amount of freeboard. Standards for required freeboard are established by classification societies and depend on the design of the ship and the region and season of navigation. buoyancy[′bȯi·ən·sē] (fluid mechanics) The resultant vertical force exerted on a body by a static fluid in which it is submerged or floating. buoyancy
buoyancy (1) The degree to which a body floats in a liquid. (2) The force exerted by a fluid on a floating body, which opposes the force of gravity and is equal to the body’s density.LegalSeeBuoybuoyancy
Synonyms for buoyancynoun floatabilitySynonyms- floatability
- lightness
- weightlessness
noun cheerfulnessSynonyms- cheerfulness
- bounce
- pep
- animation
- good humour
- high spirits
- zing
- liveliness
- spiritedness
- cheeriness
- sunniness
noun expansionSynonyms- expansion
- development
- strength
- mushrooming
- economic growth
Synonyms for buoyancynoun the ability to recover quickly from depression or discouragementSynonyms- bounce
- elasticity
- resilience
- resiliency
Synonyms for buoyancynoun cheerfulness that bubbles to the surfaceSynonymsRelated Wordsnoun the property of something weightless and insubstantialSynonymsRelated Wordsnoun the tendency to float in water or other liquidRelated Wordsnoun irrepressible liveliness and good spiritSynonymsRelated Words- sprightliness
- liveliness
- spirit
- life
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