A black hole
The remains of a massive star pulled into a small volume by gravity?
All substances have volume, but gravity is not a substance; gravity is a force and has no volume.
Jupiter is far more massive than Mars and therefore its gravity field covers a larger volume of space so that it has been able to capture more debris from that volume.
If an object's volume remains constant but its volume is decreased,its density becomes ambiguous and mutually inconclusive.
Weight = (density) times (volume)The definition of density is mass/volume .Now [ weight = mass x gravity ], so [ mass = weight/gravity ], and [ density = weight/gravity x volume ] .So Weight = (density) x (volume) x (gravity)
yes
If it remains sealed the volume remains the same.
If the temperature remains constant, decreasing the volume will increase the pressure.
volume
centre of gravity
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.
Density is not affected by gravity. Density is affected by mass and volume, such that density = mass/volume. Weight, but not mass, is affected by gravity. Weight and mass are not the same thing.