Tip 1: How to find the density of matter

One of the most important parameters of the physical body - the density.By definition, the density - scalar quantity measured for homogeneous bodies ratio of body weight to its volume.On the basis of the definition is to be understood that the density of the body can be displayed only for homogeneous bodies, that is, not having cavities.Therefore, keeping within the body cavities are always required, or the calculations may be wrong.Certainly for liquids are not affected.The formula for determining the density of a body r (rho) is the ratio of mass to volume of the body, so it is important to find these two components.
you need
  • - scales
  • - 2 beakers or measuring capacity
  • - glass
  • - dynamometer
  • - table of measurements (SI)
  • - table volumes
  • - translation table units
To get started is to determine the mass of the body, for use of weights.We put the body on the scale and see a quantitative measure of body weight measured in kilograms or grams everything depends on the balan
ce and proper body weight.In any case, the mass transfer in weight, since it is the basic unit in SI.If no scale is possible to determine the mass of the body using a dynamometer.Of course, this depends on the actual body weight, because if m = 50 kg, then the necessary and appropriate load cell.The general principle of the measurement of body weight in this case is to hang on the load cell body and see its value, which is expressed in Newtons, then knowing that the stretching force of the dynamometer to 1 H need weight 102 grams body weight forward.So body weight determined.

To determine the mass of the liquid must first measure the weight of the container into which the liquid is poured.After that, pour the test liquid in a container and put back on the balance, the difference in weight of the container with the liquid and the container without the liquid and will be the weight of the liquid.
Dynamometer in action
pass to the volume.If the body is a regular geometric figure, then the calculation of the volume should not be a problem.If for example the body of a parallelepiped, then take the table volumes and see that V = abc, where a, b, c are the length, width and height to easily find the value of multiplying the amount.But there are times when the body can not be called a geometrically correct, therefore, to determine the scope of such a body using the following method.Depending on the size of the body takes a beaker or other measuring container is filled with water and, then mark the line in the vessel, which corresponds to the maximum water capacity.Take the test and the body is immersed in water, according to the law of Archimedes volume of the body is equal to the volume of displaced water, we can measure the volume of water displaced.To do this, take a glass and pour the water from the tank into the beaker until the water reaches the previously marked line.We look into the beaker and see the amount of water that is equal to the volume of our body.

volume of fluid is easier to calculate.It is necessary simply to pour it into the measuring beaker or other container, and the result will be obvious.

It must be remembered, to be transferred to the SI system, ietransfer received milliliters or liters to cubic meters, for this we use the translation table units ( http://www.composite.ru/poleznaya_informaciya/table_calculate/ ).
Archimedes opened his own law
now remains only part of the computer.r = m / v.Divide the weight of the body on the resulting volume and get the density of the body.

Tip 2: How to find the density

To find density any body, measure its weight on the scales, and the amount of geometric or otherwise.Then find the ratio of the mass and volume.The density of the liquid was measured using a hydrometer and density gas densitometer.
How to find the density
you need
  • scales and measuring cylinder, hydrometer, density meter
Calculation of the density of matter.If you want to measure the density of solid or liquid get on the scale of their mass.Then measure the volume.If the body or vessel with liquid has a regular geometric shape, calculate it.In the case where the body has the shape of a parallelepiped (brick), measure the length, width and height, and multiply these three values.If the shape of a cylinder - Measure the diameter of its base and height and then multiply by the square of the diameter and height of 3.14, and the result divide by 4.
A simpler option - pour the liquid into a measuring cylinder and scale determine its volume.To find the volume of a solid body of irregular shape, fill it with water in a measuring cylinder and immerse the body, but raising the level of the liquid determine the volume of the body.To find
density of matter, its weight divide by the amount of ρ = m / V.If the weight measured in kilograms, the volume is measured in cubic meters if in grams, in cubic centimeters.
Calculation of fluid density.Pour the liquid into the vessel so that it can be lowered into a hydrometer which resembles float without touching the bottom.After it is floated in a liquid, on a scale that is on top of a hydrometer, determine density fluid meniscus along the lower portion of the tube adjacent to the device.This device is convenient because using it is very convenient to determine the concentration of dissolved substances.To do this, you just need to change its scale.
gaza.Dlya density calculation determining the density of gas, use a vibratory densitometer.Fill it with gas sensor and bring the unit into operation.On its screen, you will see density gas.This instrument provides the highest measurement precision, and it will not allow for the dust, moisture, oil mist and other impurities.With settings vibrating densitometer can be used to determine the concentration of gases in the air.
Helpful Hint
In determining the density of liquids you can use the communicating vessels, according to the formula r1h1 = r2h2, if we take as a second liquid water, and knowing its density r = 1,000 kg /m3.Measure the height of the liquid line and transfer to the subway.
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