Physical method of finding the volume of any body in any state of aggregation, to calculate, knowing its mass and density. That is, if you know the density of the fluid (as long as you know the title and next, find the table of densities in the physical directory) and its mass, simply divide the value of mass and density. The units of these quantities should be the following: if the mass is given in kilograms, then the density should be in cubic meters, if the mass is measured in grams, the density is in cubic centimeters.Example1: assume that you want to find the volume of 2 kg of water. Solution: the Volume is equal to the ratio of the mass (2kg) to water density (it is equal to 1000 kg/(m cubed). Total volume is equal to 0.002 cubic meter.
Another mathematical method of measuring the volume liquid: form. Because, as a rule, she always poured into any vessel. Then you need to know how to find the volume of geometric shapes the vessel. For example, if water is poured into the tank, and he is a parallelepiped, then its volume and hence the volume of water you can calculate as the product of height, length and width of the aquarium. The same can be done with any form. The basic rule of finding the volume: it is the product of the height of the square base. Example 2: To the edges of the aquarium is filled with water, what is its volume if the dimensions of aquarium: 20 cm, 30 cm, 40cm. Solution. To find the volume of water, it is necessary to determine the volume of liquid: the amount equal to the product of height, length and width of the vessel. V = 20cm*30cm*40cm = 240000 cubic centimeters. Answer: the volume of water equal to 240000 cubic centimeters.
The easiest way to measure the volume of a liquid measuring vessel having a scale division value, measurement unit. An example of the measuring vessel can be beaker, syringe, bucket, Cup etc. the Main thing in this method – not to be mistaken with the testimony of the measuring device. Example 3. The glass is half filled with water. Need to find its volume. Solution: if glass is placed a maximum of 200 milliliters of water, one half Cup - one hundred milliliters.