Is their any object that is absolutely weightless, but does not float?

I'm thinking an inflated balloon, but then again that thing does have a little bit of weight to it.Is their any object that is absolutely weightless, but does not float?
Nothing is weightless. You should put some nothing in a pool and see if it sinks.Is their any object that is absolutely weightless, but does not float?
There is nothing that is absolutely weightless.


The way to find really light things that sink is to think about their shape.





Most really light things will float because they are lighter than water OR they ';stick'; to the surface.





Although nothing is weightless, if you can find things that don't ';stick'; easily, you can get some pretty light things to sink.





Try it, there is a lot to learn about what shapes work and what one's don't.





Hope this will get you started.
When you talk about something floating, you are talking about the equilibrium of the bouyant force to the weight of the water that is displaced by the object. The bouyany force deals with the weight of the object and the density of the material it is submerged in. If something weighed little or nothing, it would tend to float because of the bouyant force being stronger in the equilibrium. Just remember that the equation for the net forces of something floating would be...





Fnet = mg - pVg....... where m=mass of object, g= gravity (9.81), p= density of liquid, V= volume of liquid.... as you can see when you multiply the density of something ';mass/volume'; by its volume, you get the mass. This is what I was saying earlier in that you are only concerned with the weight of the water displaced. As you can see, if the weight was very little and the object still displaced a large amount of water, it would be very bouyant. If you could get and object that weighed close to nothing, it would have to displace almost no water to not float. Keep in mind that when you say it weights next to nothing, it must displace next to nothing in the liquid it is in.
It's not something being absolutely weightless, it's being in *freefall*. A ship in orbit around the planet is basically constantly falling towards the Earth, it's just that its forward momentum means it keeps missing, so carries on falling. So the things inside it are in freefall, so are weightless.





And a spaceship heading to the moon, for example, spends most of the time coasting, rather than under thrust. Because there is no acceleration, there's no force, so things are weightless.





You'd experience exactly the same effect if you were in a lift that plummeted 30 stories - you'd be weightless, unfortunately you'd soon hit the ground. In space, of course, there's less ground to hit...
A photon (particle of light)