**DOBJECT
a PLAYCHEM experiment
DENSITY of an IRREGULAR OBJECT**

Matter is defined as something having mass and occuping space. The ratio of mass to space occupied is called Mathematically, One method of determining density involves measuring both weight and volume. Weight is measured using a balance. There are several ways of measuring the Volume of an object. - Using geometry and the dimensions of a regular object
- Measuring the weight or volume of a liquid displaced by the object when totally immersed.
Method 2. can take on some sophisticated logic and that is the case for this experiment. The objects you will measure will have some irregularity so you will measure their volume using the concept of buoyancy in a liquid. As a brief introduction: - If an insoluble object is immersed in a fluid under the influence of
gravity:
- an object less dense than the fluid will float. It displaces its weight of fluid.
- an object more dense will sink. It displaces its volume of fluid
- an object of equal density will remain suspended under the fluid's surface, neither sinking nor floating. Since it is completely underwater, it displaces its volume of fluid. And since the object and fluid have the same density it also displaces its weight of fluid.
To determine the density of your UNKNOWN Object, you will make three weighings involving a container of water with or without your object. You will also need the density of water. Two of the weighings you will make are shown below. |