How to determine the density of the glass
The physical meaning of the density of matter is its mass, enclosed in a certain volume. There are many methods for determining this parameter. But one of them, known since school textbooks and based on the displacement effect of liquids immersed in them solids, stands out for its simplicity and sufficient accuracy. In a similar way it is possible to determine the density, for example, glass.
You will need:
- beaker; - The test window; - Precise (preferably electronic) scales; - Water.
Instruction how to determine the density of the glass
Prepare everything you need for measurements. First of all you need a beaker, and scales. The beaker must be sufficiently precise calibration and scale to allow measurement of the mass to the nearest tenth of a gram. At the same time the beaker should be securely installed on the scales. Prepare the glass, which you want to measure density. The fragments should be sufficiently small. Therefore, if necessary, crush the glass prior to the experiment.
Start the experiment to find a glass density. In about a third beaker add water. Determine the scope of its divisions on the scale. Then weigh the beaker to make the liquid contained therein. Record the measurement results, marking the initial volume as the V1, and the weight of the beaker with water as the m1.
Place in a beaker a quantity of crushed glass. It should be sufficient both in mass and in order that the water level rose significantly (this will reduce errors in the calculations). Proceed with caution, placing the glass beaker in small portions. Use metal tongs or a spatula. Note that the liquid should completely cover all of the glass particles. Between them should not be any air bubbles. If they are available, shake the beaker several times.
Make repeated measurements. Again, weigh the beaker, as well as find out the volume of its contents. Mark found a mass m2, and volume as the V2.
Determine the density of the glass. Locate weight fragments placed in a beaker. Since the weight of the fluid in the device and it has not changed, it will be equal to m2-m1. glass volume will be equal to the volume of fluid displaced by them, that is, V2-V1. Thus, the density of the glass can be calculated Ρ = (m2-m1) / (V2-V1).