What is buoyancy. Explain in simple terms.?

Answer 1

It's all about the density of an object.

Let's say you have a square metal box the size of a bus, and it weights 10,000#. The box is empty, like a metal ship is.

Take the same size of water. The water weighs...and I'm just making up a number here, 20,000# pounds.

The box is lighter than the water, substantially lighter.

So, if you figure that 10,000# of water is being pushed out of the way by the container.

And since the weight of the container is about 1/2 of the same amount of water, then slightly less than half of the container will be above the water surface.

Also note that because of gravity, water stays lower than air because it is heavier, and ends up filling up holes in the land, which is why we have lakes.

When liquid becomes ice, it becomes larger. Which is why pop cans explode if you leave them in the freezer. Since water that turns into ice bergs are now slightly larger, they are less dense than the water itself, and they float.

Answer 2

Explain Buoyancy

Answer 3

Just a quick addition to Tankarri's answer (which is good).

Archimedes theory explains buoyancy thus:

An object, when wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid that it displaces.

Put this together with the other answer and see what you get!

Answer 4

Buoyancy is simply floating.

If someone has a positive buoyancy, they float very easily and tend to stay on the top of the water.

If someone has a negative buoyancy, they sink.

Answer 5

Buoyandy relates to an object's density.

If you have a bucket of wter, it hass a certain mass and density.

Fill the same bucket with concrete it has more mass (weight) and so is more dense.

Fill the same bucket with air, it has less mass and is less dense.

Something that is less dense will float in something more dense.

A cork is less dense than water, so cork floats.

A rock (except pumice) is more dense than water so it sinks.

If something is a mixture, then it is the overall density that counts.

A boat made of metal floats although the metal is more dense than water because it contains air which is less dense and the overall density is less than water.

In a person, someone with high body fat has less dencity (more buoyancy) than someone with lean muscle mass.

Someone with lungs filled with air has more buoyancy than someone who has empotied their lungs.

Hope that helps

Answer 6

boyance simply is the matter of 'how much something floats'

its relate to the weight of the object, and its ratio to the volume of water it displaces when submerged.

if the object weigs less than the water it displaces, it floats, if it is heaver it will sink.

Answer 7

its simple as "the ability of an object to float in liquid matters"

Answer 8

the power or tendency of a liquid or gas to keep an object afloat.

Answer 9

(560x9.8) Newtons