Guide

1

In that case, if the body known indicators such as its volume (V) and

**density**(p), the calculation of body weight required to use the formula: m = p* V. 2

For clarity, we can give you an example.Required to find

Solution: To find the weight of the concrete slab needs to know only his

**weight of the concrete slab, whose capacity is 15 m³.**Solution: To find the weight of the concrete slab needs to know only his

**density**.To find out this information, you need to use the table of densities of different substances. 3

According to this table
ion: m = 15 * 2300 = 34500 kg, or 34.5 tons.A: The weight of the concrete slab of 34.5 tons

**concrete density of 2300 kg / m³.Then, in order to find****weight of the concrete slab, need to make a simple algebraic operat** 4

mass measurement takes place in a conventional manner by means of one of the oldest instruments of mankind - with the help of weights.This is due to the body weight compared to using the standard weight of cargo - weights.

Note

perform calculations on the above formula, it is necessary to realize that in this way the rest mass of the recognized body.An interesting fact is that many of the elementary particles have an oscillating mass, which depends on the speed of their movement.If an elementary particle moving at the speed of the body, this is a massless particle (eg, a photon).If the particle velocity below the speed of light, then such a particle called massive.

Helpful Hint

When measuring the masses can never forget what the system will be given a final result.There is a view that in the SI system weight measured in kilograms, while in the CGS system weight is measured in grams.Also, the mass is measured in tons, quintals carats, pounds, ounces, poods, as well as many other units, depending on the country and culture.In our country, for example, a lot of old were measured in poods, Berkovtsy spool.

Sources:

- weight of the concrete slab