If they are more dense than water, then they won't float. Note that to calculate the density, you have to consider the mass and volume of the entire ship, including any air trapped inside the ship.
Because water is more dense then our bodies so when things are more dense they sink to the bottom and when they are less dense they float to the top
Floating and sinking is related to density - if something is more dense (i.e. has more mass per volume) than the fluid it will sink, and if it is less dense then it will float. This is why wood floats in water, and helium balloons float in air - helium is less dense than air and wood is less dense than water. Steel ships float because, although they are made of steel which is more dense than water, the air inside them is less dense than water so the overall effect is floating.
It depends on the density of the block. If the block is less dense than water, it will float. If it is more dense, it will sink.
If it is more dense than water, like gold or iron or mercury or granite, it will sink. If it is less dense than water, like styrofoam, oil or coconuts, it will float. The density of water is very very close to 1 gram per millilitre, or 1 kilogram per litre. Out of interest, ships float becasue they have a lower density than water. Although they are iron, the air within the ships hull makes them less dense than water.
Every rock (minding bedrock) bricks, ships or boats if they get water in them, concrete, cement, televisions, stereos, ....etc. Things more dense that water
Salt
No, it will only float in a liquid more dense than it. Since it is more dense than water, it would sink in water, for example.
Ships don't sink because they are more boant then the water they float on. Ships don't sink because they are more boant then the water they float on.
No, feldspar does not float in water because it is more dense than water. When placed in water, feldspar will sink to the bottom.
Chlorine gas is less dense than water, so it will float on top of water if the two are in contact.
Pears do not float in water because the pear is more dense than the water. The pear has a high water content, therefore making it more dense. For example, apples float because they are less dense than the water.
If the object, when submerged in water, displaces a volume of water whose mass is greater than its own, then it will float. The density of the material from which it is made is not the key as can be seen from the fact that ships made of metal will float.