Volume characterizes some area of space with the set borders in number. In several sections of mathematics it is calculated in a form of borders and the sizes or on the cross-sectional area and coordinates. When speak about a physical formula of calculation of volume, usually mean calculations for other parameters of a body - density and weight.
Instruction
1. Learn density (ρ) of the material making a physical body which volume needs to be calculated. Density - one of two characteristics of an object involved in a formula of calculation of volume. If it is about real objects, in calculations the average density as in actual practice it is difficult to present absolutely uniform physical body is used. In it surely there will be unevenly microscopic emptiness or impregnations of foreign materials distributed at least. Consider when determining this parameter and temperature - the it is higher, the substance density as at heating increases distance between its molecules is less.
2. The second parameter which is necessary for calculation of volume - the mass (m) of the considered body. This size will be determined, as a rule, by results of interaction of an object with other objects or gravitational fields created by them. Most often it is necessary to deal with the weight expressed through interaction with Earth attraction force - body weight. Ways of determination of this size for rather small objects are simple - they need just to be weighed.
3. For calculation of volume (V) body divide the parameter determined on the second step - weight - into the parameter received on the first step - density: V=m/ρ.
4. In practical calculations for calculations it is possible to use, for example, the volume calculator. He is convenient that he does not demand to look for density of the necessary material somewhere else and to enter it in the calculator - in shape is a drop-down list with the list of the materials which are most often used in calculations. Having chosen in it the necessary line, enter weight into the Weight field, and in the field "Calculation Accuracy" set the number of signs after a comma which have to be present at result of calculations. You will find volume in liters and cubic meters in the table placed below. In the same place the radius of the sphere and the party of a cube which has to correspond such volume of the chosen substance will be just in case specified.