Capacity of capacity can be learned in different ways. If the object of measurement has the correct geometrical form, determine its sizes and use the corresponding algorithm of calculation.
It is required to you
- - measured vessel;
- - roulette;
- - calculator;
- - known mass of nitrogen;
- - manometer;
- - thermometer;
- - formulas for scoping of solids.
Instruction
1. Establishing the volume of capacity of the correct geometrical form (prisms, a parallelepiped, a pyramid, a cylinder, a cone, a sphere, etc.), find its internal linear dimensions and make calculation. For example, measure and designate respectively by letters h, d height and internal diameter of a cylindrical barrel.
2. Having applied a formula of finding of volume of a cylinder, increase number π ≈ 3.14 by a square of diameter of the basis of a barrel and by its height. The received result divide into four (V=π ∙ d² ∙ h/4). Determining the capacity of the capacity having the form of other solid use a formula of calculation of volume for the corresponding figure.
3. If it is difficult to find a mathematical way the capacity of capacity of irregular shape, fill it up to the top with water. In this case the volume of liquid will be equal to the corresponding parameter of the object of measurement. Accurately merge in water in the calibrated vessel or in the capacity of the correct form.
4. Determine volume by a scale with divisions if you filled in liquid in a measured vessel. This size will be equal to the capacity of the measured capacity. Having filled in water in a vessel of the correct geometrical form, calculate its volume by the method described above.
5. If the object of measurement can be closed hermetically, but it is too big for filling with water, begin to rock in it the mass of nitrogen known to you. By means of the manometer and the thermometer take respectively pressure and temperature in capacity. Find in cubic meters the volume of the pumped gas on a formula V= (m∙R∙T) / (M∙P).
6. Express pressure in Pascals, and temperature in Kelvins. Increase the mass of gas m by its temperature of t and by universal gas constant R. Divide the received result into the work of pressure of nitrogen P and its molar mass of M which makes 0.028 kg/mol.