The only possible reason for that would be that after the object floated for a while,the salt ate a hole in it, the water poured into it, and it stopped floating.If the object doesn't corrode, dissolve, or get water-logged, then it might float insalty water and sink in fresh water, because salty water is always more densethan either fresh or distilled water.
float
A fresh egg don't float in pure water; in a salty water the floating depends on the concentration of the salt in solution. The salty water is more dense.
I think substances can float in very salty water, because salty water (example the dead sea)is much more denser than other any other non-salty water, so things will float much more easier.
A perspex block sinks in fresh water because it is denser than the water. In salty water, the added salt increases the water's density, causing the perspex block to float. This is due to the principle of buoyancy, where an object will float if it is less dense than the fluid it is in.
You can float an egg in very salty water.
salty
the dead sea has very salty water. you can float because of the high content of salt.
Eggs float in salty water because the density of the salty water is higher than that of the egg, causing it to float. In ordinary water, the density of the egg is higher than that of the water, so it sinks. The increased density in the salty water creates more buoyant force, allowing the egg to float.
The egg will float at the salty water
Not necessarily. An object's ability to float in a liquid depends on the density of the object compared to the density of the liquid. Even though an object may float in oil, it may not float in water if the object is more dense than water.
Yes, if it makes the water denser, the boat will float easier. For example, it is easier to float in salty water.