Recall Archimedes's principle. If the weight of the displaced liquid is more than the weight of the body put in the liquid then the body has to float. If weight of the body is more than that of the displaced liquid then body gets immersed.
An object will float if it is less dense than the water (or other liquid). If it is denser than the water, it sinks.
Lead will sink in liquid mercury because lead is denser than mercury. Mercury is a heavy liquid metal, so most metals will sink when placed in it.
Solid water, ice, is less dense than liquid water and floats on top. The solid state of other substances is more dense than the liquid state and will sink in the liquid.
It depends on the density of an object. If the density is higher than the density of the liquid, the it sink. If it's less, it floats.
Things float when they are less dense than the liquid they are placed in, allowing them to displace an amount of liquid equal to their weight. Things sink when they are denser than the liquid, causing them to displace less liquid than their weight and therefore sink.
Floats
Objects float in a liquid if they are less dense than the liquid, displacing a weight of liquid equal to their weight. Objects sink if they are denser than the liquid, unable to displace enough liquid to support their weight. Archimedes' principle governs whether an object floats or sinks in a liquid.
a pen floats
A pencil floats, a human no float, a feather floats, paper floats, ice floats, keys do not float, rocks do not float, coins do not, flip flops float. Second answer: I think you meant to ask, 'What floats and then some time later starts to sink. If that is what you meant, the answer is: There are absorbent substances which float when dry, then after absorbing water while they are floating, they increase in density and then sink.
An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
No. Exactly the opposite. Water is the only known substance whose solid form floats in its liquid form. Which, incidentally, is a lucky accident, since life on earth would be impossible if ice sank in water.