to circulate water in fresh water tank to expansion talk.
Robert Frost
Yes
i dont really know sorry
They get it from a desalination plant onboard a mighty fine ship.
It will swell and burst
they will die
it would shrink
sea water is denser.
The ship will sink slightly. Salt water is denser there for heavy objects will float more in it. When the ship goes back to fresh water the density decreases and the ship lowers again. This link gives extra information and some simple experiments for you to try at home. http://www.kidsgen.com/school_projects/how_ships_float.htm
Ocean. The ship will ride higher in salt water than fresh in water. There is a load line on the side of ships to tell you how deep you can load the ship. You can load the ship deeper if it is in fresh water because it will come up when it gets to the ocean.
A water pump is needed to pump in fresh water.