It doesn't really matter whether the contents is liquid or otherwise. Formulae for several regular shapes are known - you can use one of them. If you don't find the formula for a specific shape, you can use integration. This is covered in introductory calculus books; roughly speaking, it means dividing the shape into small pieces, for example, small rectangles. That's how many of the well-known formulae are obtained, as well.
The unit for volume is the same, whether the shape is regular or irregular.
density is mass per volume. First weigh (mass) the key, then to find it's volume, place it into a container with liquid and measure how much volume is displaced.
When You are measuring the volume of an object(not liquid)
It depends on the way the question is asked. If you are dealing with a cubic or rectangular object, you measure the length, width, and height, and multiply them. If it is a spherical or irregularly shaped object, you could used water displacement to find its volume. If it's a liquid, you could use a graduated cylinder to measure its volume.
With an eureca can yiu can measure the volume of an unregular shaped object :)
cubed
conclusion
Weigh the object. Determine the volume. Divide the mass by the volume to get the density. To get the volume of an irregular shaped object can be challenging especially if there are cavities (holes) in it. submersion in a liquid or powder of known volume might be possible. Measure the difference in the volume of the liquid and the liquid + the object (making sure the object is entirely below the surface of the liquid and that any cavities are filled).
LxWxH=Answer _ cm3
If the shape of the object is regular (a cube or a sphere) then the volume can be calculated from the measurement of the object's key dimension(s). And the object's mass can be determined in a mass balance. Give the mass and volume the density is calculated by dividing the mass by the volume. Where the object's shape is irregular, the volume may be determined by measuring the volume of a liquid displaced by submerging the object completely in that liquid.
Yes
lenght x weight x height
Length times width times height.
Immerse the object completely in a liquid (e.g. water) and measure the volume of liquid displaced.
Volume displacement is the method used to find the volume of small or irregularly shaped objects by noting the difference in the level of liquid before and after after immersing an object into a graduated cylinder or beaker of liquid. The difference between the before and after levels of the liquid is the volume of an immersed object.
There are 12 inches.
Measure the volume of the object which is same as the volume of the displaced liquid in which that sinks. And measure the mass of the same object from a weighing machine. then use density = mass/volume