Final answer:
Volume of regular objects is computed using geometric formulas according to their shapes, while volume of irregular objects is typically measured by water displacement. Density is then determined by dividing mass by volume.
Step-by-step explanation:
The volume of an object is the measure of the physical space it occupies, and it is measured in cubic units. To determine the volume of regular objects, one can use geometric formulas. For instance, the volume of a rectangular box is found by multiplying its length x width x height, and the volume of a cube is the edge length cubed.
For irregular objects, volume can be measured by water displacement. This method is based on the principle that a solid object will displace an amount of water equal to the object's volume when it is fully submerged. By submerging the irregular object in a graduated cylinder filled with water and measuring the change in water level, the volume of the object can be determined.
When determining density, the mass is measured using an analytical balance, and the volume is measured as described above for either regular or irregular objects. Then, density can be calculated by dividing the mass by the volume.