Its density becomes infinite. Except that what you have described is a black hole and the ordinary laws of physics and maths do not apply in or within the event horizon of a black hole.
It increases.
Gravity density. Whenever a sufficient mass is squeezed into a small enough volume ... then a black hole occures. "Normally" this only ocures when a massive star runs out of (hydrogen) fuel and collapses in on itself.
Yes. When you squeeze the balloon, you cause the volume to decrease. Since density is determined by dividing mass by volume, a decrease in volume will cause an increase in denisty.
Mass = Density x Volume Density = Mass/Volume Volume = Mass/Density
Of course. Like anything, when bread is crushed, its density increases. Anything that is crushed will have higher density in its crushed state. The only things that you can crush and NOT (permamently) increase their density are those that return to their original shape after being crushed. The increase in density is due to the fact that there is more bread in a smaller volume. When you squeeze the bread, you squeeze out some of the air, reducing its volume while maintaining its mass. Density = mass/volume.
Volume = mass / Density Mass = Volume * Density Density = Mass / Volume
Density = Mass / Volume Rearranging this gives: Volume = Mass / Density Mass = Density × Volume
Density = (Mass) divided by (Volume) If you know the density and volume, then Mass = (Density) times (Volume)
density = mass/volume mass = density x volume volume = mass/density
Mass = Density x Volume Density = Mass ÷ Volume Volume = Mass ÷ Density
d=m/v density= mass/ volume
volume = mass/density and density = mass/volume