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scientifico
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Hello, does bouyancy exist if there isn't the force of gravity but i push down the object in the water with my force?
thanks!
thanks!
Doc Al said:The buoyant force on an object is due to the pressure of the fluid on the object. But without gravity there would be no pressure and thus no buoyant force.
Does that address your question?
scientifico said:Hello, does bouyancy exist if there isn't the force of gravity but i push down the object in the water with my force?
thanks!
Good point! (Although I'd say differences in pressure give rise to buoyancy, but a rotating system can certainly create a pressure gradient.)Andy Resnick said:The origin of "bouyancy" is from differences in density; gravity is usually the relevant force but any force will do, for example the centripetal force.
Sure, there'd be some small force.pallidin said:I thought that, say, a gallon of water(in the form of a sphere, for example)in deep space does not spontaneously separate into H2O molecules; rather that the "sphere" is maintained.
As such, a bubble within that water sphere would experience pressure; forcing the bubble to the exterior.
Could be totally wrong though...
pallidin said:As such, a bubble within that water sphere would experience pressure; forcing the bubble to the exterior.
Andy Resnick said:..., you can separate air from water in space by rotating the container- the air will migrate to the center.
Doc Al said:Good point! (Although I'd say differences in pressure give rise to buoyancy, but a rotating system can certainly create a pressure gradient.)
Of course, the reason the sphere does not separate and bubbles "rise" to the exterior, is because of the gravitational force between molecules of water so this doesn't really fit your "no gravity" requirement.pallidin said:I thought that, say, a gallon of water(in the form of a sphere, for example)in deep space does not spontaneously separate into H2O molecules; rather that the "sphere" is maintained.
As such, a bubble within that water sphere would experience pressure; forcing the bubble to the exterior.
Could be totally wrong though...
HallsofIvy said:Of course, the reason the sphere does not separate and bubbles "rise" to the exterior, is because of the gravitational force between molecules of water so this doesn't really fit your "no gravity" requirement.
HallsofIvy said:Of course, the reason the sphere does not separate and bubbles "rise" to the exterior, is because of the gravitational force between molecules of water so this doesn't really fit your "no gravity" requirement.
Buoyancy is a force caused by the displacement of fluid, which is a result of the difference in density between an object and the fluid it is immersed in. In the absence of gravity, the force of buoyancy is still present but the direction of the force is not determined by the downward pull of gravity.
Yes, objects can still float in a zero gravity environment due to the force of buoyancy. As long as the object is less dense than the fluid it is in, it will experience an upward force and appear to be floating.
Yes, the concept of buoyancy is still relevant in space. Although there is no gravity, objects in space are still surrounded by fluid, such as air or water, and will experience a force of buoyancy based on their density.
Buoyancy can affect the movement of objects in a zero gravity environment by causing them to appear to float or move in different directions. The direction of the buoyant force is based on the relative densities of the object and the fluid it is in.
Yes, buoyancy can be used in space exploration. For example, astronauts use buoyancy to move around in space during spacewalks by using their suits as a buoyant force against the vacuum of space. Buoyancy can also be used to propel spacecraft through the use of buoyancy engines.