No. It may change its weight if weighed at varying depths.
No
You can change the mass of water in two ways: increase or decrease the amount of water or change the isotopic composition of the molecules of water. The first will have no effect on the mass of 1 cc of water. The second will. If you replace the hydrogen atoms in the "normal" water molecules with deuterium atoms you will increase the density (mass/cc) of the water.
When mass increases and volume stays constant, the density increases. When volume increases and mass stays constant the density decreases. When they both change, then the density will depend on the rate of change of mass and the rate of change of volume.
Volume
To change density there are three ways. You can change the shape, mass or volume of the object
Density = mass / volume. So if the volume changes, the density will obviously also change.
You can change the density of a substance by changing its volume. Density is equivalent to mass over volume. So changing the volume affects density.
The volume increase, mass does not change.
No
changing mass and volume
Yes if the both are not changed proportionately, Density = mass/volume.
No
boobs
Mass is mass. It is constant. Changing water from liquid to gas does not change the mass, it only changes the density, which is mass per volume. Look at it another way - in gaseous form, the same mass of water has the same number of molecules of water - but those molecules are simply further apart.
Density = mass / volume. So if the volume changes, the density will obviously also change.
Yes because the sand adds more mass to the mass of the water, therefore the density and volume also change
If you mean why does the density of an object not change when it undergoes a physical change such as a change of shape then the answer is because density is a chemical trait found by dividing the mass by the volume and if you modify the volume then the mass will also be modified for example water has a density of 1 g/cm^3 meaning if you have 3 grams of water it takes up 3 cm^3 even if you change the mass when you change the mass you are also changing the volume same goes if you change the volume you change the mass. In other words mass and volume are relative to each other and when you divide mass by volume you get a number the density the density represents a ratio for water the density is 1 g/cm^3 the ratio of mass to volume is 1:1,1/1, or 1 to 1 meaning for every cm^3 you have of water you will have an equivalent amount of grams. 1 to 1 1 part mass 1 part volume but that is just for water every substance has a density and they rarely if ever are equal.