The difference in water density (hot-cold) is very small, compared to the difference in density between water of any temperature, and your body. That is, even hot water is more dense that we are, so we still float.
This depends on the density of this item: more denser than water-sink, less denser than water-float.
no because it isn't hollow and denser than water
Asphalt is denser than water and will sink in water rather than float.
No, polycarbonate does not float on water. It is denser than water and will sink when placed in it.
No, muscovite does not float on water because it is denser than water.
No, candles do not float in water because they are denser than water and will sink.
Depends on what they're dropped into. Water - no. But drop them into something that's denser than aluminium and they will float.
Salt water is denser than fresh water. A ship will float higher on the oceans, and float lower on a fresh water inland lake.
Denser than water.
NO, because it is denser than water
No, cashews are denser than water, so they generally sink in water rather than float.
More physics than chemistry, really. Salt makes the water denser, allowing denser objects to float, than in pure water.