need help desperatly in GPS

[shannondeann]

Using the laws of physics and the correct scientific terms describe how a submarine is able to submerge and surface again?

[KebabMeister]

Try googling 'how does a submarine work'. Hope this helps with your homework.

[mibn2cweus]

hint: buoyancy?

[brachiopod]

...and bouyancy is a function of average density.

By taking in or evacuating ballast water, the sub will make its average density less than or greater than the water around it, making it rise or fall, respectively, within the water column.

[burnhal]

we just used to put the planes hard to rise and blow 1,2,3 and 6,7,8 main ballast