You will need

- - Libra,
- - barometer,
- - psychometer,
- thermometer,
- calculator,
- - Handbook of physics.

Instruction

1

The density of all substances depends on external factors: humidity, temperature and atmospheric pressure. At the same time, the more intense the substance to absorb moisture (hygroscopicity), the larger changes in density. The same volume filled with a substance of different density, different mass. For example, the density of the wood depending on the content of water can change by more than two times. For liquids (in particular water), the density depends on the presence of impurities is taken into account when calculating the weight of the ballast on the boat: fresh water is lighter than marine.

Food products are often sold in standard packaging. If it goes on this case, the question of determining the weight of the material is omitted - it indicated on the packaging.

Food products are often sold in standard packaging. If it goes on this case, the question of determining the weight of the material is omitted - it indicated on the packaging.

2

For convenience, there is a conversion chart kilograms (or grams) in milliliters for the most frequently used food products. Based on matching the values of mass and volume in these tables is made of the special measuring utensils for dry and liquid food products.

3

Find the Handbook on the physics test substance and determine the tables its density. For greater precision on subsequent calculations, use the available reference amendments to the humidity, pressure and temperature of the surrounding air.

4

Bring a table value of the density to the desired units of measure, i.e. pounds per cubic milliliter. The density of the material in reference books in physics are usually specified in SI units - kg/cu. m, so you put the container in a milliliter (1 cubic meter equals 1000 liters, and 1 liter is 1000 ml), and then multiply the value of density from the table on the resulting number density * 1 kg/1 000000 ml.

5

Weigh the test substance – use cooked weights. Translate, if necessary, the value in kilograms (1kg is 1000 grams).

6

Divide using a calculator the value of mass in kilograms per density. The resulting quotient will be the volume of the test substance in milliliters, that is, the desired ratio of the mass in kilograms and volume in milliliters.

# Advice 2: How to translate kilograms to liters

Kg - measure of mass of a substance used in the international system of units SI, and a liter is a volume measure, not included in this system. The physical characteristics of the bodies, measured in these units, are linked by a ratio that involves another parameter, the density of the substance. With the knowledge of two of the three options - for example, weight and density - to calculate the third volume is not working.

Instruction

1

Start from the General formula connecting the mass (m), density (p) and volume (V): V=m/p. For example, the initial conditions given the mass of liquid helium that is equal to 100 kg, and is proposed to calculate its volume at standard atmospheric pressure. The density of this substance is 130 kg/m3, so 100kg would correspond to a volume approximately equal to 100/130≈0,7692307692307692м3.

2

Put the units of the metric system, in which the obtained result of the calculation in

**liters**. In the SI system to measure volume, use cubic meters, and holds one liter is one cubic decimeter, and therefore increase the resulting value a thousand times - so many cubic decimeters are each cubic meter. In your example the answer should be a value equal to 769,2307692307692 L.3

When solving practical problems, consider the change in the density of a substance when heated. In various reference tables, the density of a liquid is given together with the indication of the measurement conditions, including temperature. And in various regulatory documents specify correction factors separately for summer and winter periods. For example, for diesel fuel summer correction factor equal to 1.03, and winter - 1,045.

4

If you define kilograms of the required liter volume solids, and still consider the heterogeneity of the material. For example, in stolitrovyh a barrel of sand contains not only the substance, but certain quantity of air between the individual grains. This number depends on the particle sizes (particle size) components of the bulk material. In addition, the easily deformable substances can be compacted, thereby increasing the average density. So, for example, the weight of cement of mark M500 in stolitrovyh barrel may not correspond to the calculations made based on the tabular density of the substance.

Note

Be careful with unit conversion.