Question

Стержень массой 312 кг имеет объем 40 дм3 определите из какого вещества состоит стержень​

Answer 1

Ответ:

Объяснение:

Дано:

m=312кг

V=40дм³=40*10⁻³м³

Найти:

ρ-?

                                                      Решение:

ρ=m/V=312кг/40*10⁻³м³=7,8*10³кг/м³=7800кг/м³

Ответ: стержень состоит из стали.

Answer 2

Determining the Substance of a Rod with Given Mass and Volume

To determine the substance of a rod with a mass of 312 kg and a volume of 40 dm³, we can use the formula:

Density = Mass / Volume

The density of a substance is a characteristic property that can help us identify the material. By calculating the density of the rod, we can compare it to the densities of known substances to determine its composition.

Let's calculate the density of the rod:

Density = 312 kg / 40 dm³

To perform the calculation, we need to convert the volume from dm³ to m³, as the unit of mass is in kilograms.

1 dm³ is equal to 0.001 m³, so the volume of the rod in m³ is:

Volume = 40 dm³ * 0.001 m³/dm³ = 0.04 m³

Now we can calculate the density:

Density = 312 kg / 0.04 m³

Calculating this, we find that the density of the rod is:

Density = 7800 kg/m³

Now that we have the density, we can compare it to the densities of known substances to determine the composition of the rod.

Unfortunately, the search results provided by You.com do not contain specific information about the density of the rod. Therefore, we cannot determine the exact substance the rod is made of based solely on the given information.

If you have any additional information or context about the rod, please provide it, and I'll do my best to assist you further.