Things that float in a fluid are less dense than the fluid. Things that sink in a fluid are more dense than the fluid.
http://wiki.answers.com/Q/Why_do_things_float_and_some_...
Some things float because they are light or the walls are high enough . Like on the foil boats you have to make the bottom flat.On the soap boats you have to make the walls high enough. Some things sink because the have holes ,or the walls ...
http://mrcsclasscompendium.blogspot.com/2008/09/why-thi...
Whether something sinks or floats in water depends on its density, or how much it weighs for a certain volume. Water weighs 1 gram for 1 cubic centimetre, or 1 kilogram for a litre. Anything that weighs less than 1 gram for 1 cubic centimet...
http://yedda.com/questions/things_float_sink_1867198527...
Objects float or sink because of their density. An example of an object with low density is a sponge, as it has loads of air bubbles in it, and will float. An example of an object with high density is a brick. This is because the brick does...
http://wiki.answers.com/Q/Will+a+nail+sink+or+float+in+...
Things float (in any fluid; liquid or gas) depending on their density. The density is the ratio of the mass of an object to the space (volume) it occupies. According to physic, an object will float if the volume of the fluid it displaces ha...
http://answers.yahoo.com/question/index?qid=20090525122...
A very interesting phenomenon. When a body is put on the surface of water, first its bottom surface gets a little bit immersed. So an amount of water vacates from its place to give room for that small portion of the body to occupy the same....
http://wiki.answers.com/Q/How+do+things+float+on+the+wa...
The buoyancy of an object (i.e. whether it sinks, floats, or stays where it is) depends on the pressure of water at that depth and the downward pressure exerted by an object on the water. Water pressure increases with increasing depth based...
http://wiki.answers.com/Q/What_makes_things_sink_or_flo...