Buoyant Force

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buoyant force

[′bȯi·ənt ′fȯrs]
(fluid mechanics)
The force exerted vertically upward by a fluid on a body wholly or partly immersed in it; its magnitude is equal to the weight of the fluid displaced by the body.

Buoyant Force


(buoyancy), the upward force that is the resultant of the pressure forces of a fluid on the surface of a body completely or partially immersed in the fluid. According to Archimedes’ principle, it is equal to the weight of the fluid that would fill the space occupied by the immersed portion of the body. The floating of bodies and of such structures as ships, boats, aerostats, and buoys is due to the buoyant force.

References in periodicals archive ?
For the geometries considered here, it will be shown that centrifugal casting will remove a large bubble, (~1 mm in diameter) from a solution spinning at thousands of revolutions per minute by buoyant forces before the bubble has sufficient time to dissolve completely, whereas smaller bubbles, (~10 [micro]m in diameter) will dissolve into solution before buoyant forces drive them to the liquid-air interface.
There are other factors that need to be considered when calculating the buoyancy of an object such its surface area, and the buoyant forces vs.
submerged in water, the magnitudes of the buoyant force on them are--.
The buoyant force grows as the warm air inside |he balloon becomes less dense.
To descend, he pops balloons to reduce the buoyant force.
When the buoyant force on a bubble overcomes surface tension, it will rise to the surface and pop.
This creates an upward force, or buoyant force, which acts opposite to Earth's downward pull of gravity.
As long as this buoyant force is equal to or greater than the weight of the ship, it will counteract the downward push of the ship's weight and keep the vessel afloat.
The ambient temperature both external to and inside the tunnel can have an impact on the buoyant forces generated by a tunnel fire.
A one-foot extension lip around the floor of the manholes was cast to allow for additional backfill to resist the buoyant forces on the manholes during high water.
Detailed analysis of teachers' understandings, confusions and rethinking processes on buoyant forces of air and water in a professional development course in Science Outreach at Washington University in fall, 2004 is presented.
Because of the simple shapes of eggs and larvae, we used force balance equations for drag and buoyant forces to determine the density of eggs and two larval stages.