They turned to space in order to eliminate the rising of hot air _ the so-called buoyancy effect _ and to slow the reactions inside flames for easier study.
12.
In the case of dry sand, sand is so much denser than air that the buoyancy effect is commonly neglected ( less than one part in one thousand ).
13.
Matsas has analysed this paradox in the scope of general relativity and also pointed out that these relativistic buoyancy effects coud be important in some questions regarding the thermodynamics of black holes.
14.
In practical sea situations the windage effect is greater than the buoyancy effect and so cruising trimarans with highly buoyant floats are more, not less, likely to capsize than those with less buoyant floats.
15.
This effect can also happen underground, if below the water table, or even above the water table, where the density of the surrounding soil provides a buoyancy effect ( buried tires can " float " to the surface ).
16.
Some diving birds have been observed to preen immediately before diving, and some researchers believe that this may expel the stored air and reduce the air volume, thus increasing over all body density, decreasing buoyancy effects and making submersion easier.
17.
Buoyancy effects, due to the upward force on the object by the surrounding fluid, can be taken into account using Archimedes'principle : the mass m has to be reduced by the displaced fluid mass \ rho V, with V the volume of the object.
18.
If the material is under pressure ( commonly ambient air pressure at the earth's surface ) the determination of mass from a measured sample weight might need to account for buoyancy effects due to the density of the void constituent, depending on how the measurement was conducted.
19.
Natural ventilation in buildings can rely mostly on wind pressure differences in windy conditions, but buoyancy effects can a ) augment this type of ventilation and b ) ensure air flow rates during still days . Buoyancy-driven ventilation can be implemented in ways that air inflow in the building does not rely solely on wind direction.
