Question

Рассчитайте массу берёзового бруска имеющего размеры 10×5×25 см. плотность берёзы 0,65 г/см³ сантиметров кубических выразите массу бруска в килограммах ​

Answer 1

Ответ: 8,125кг

Объяснение:

Дано:

а=10см

в=5см

с=25см

ρ=0,65г/см³

===========

m-?

m=ρ*V=ρ*а*в*с=0,65*10*5*25=8125г=8,125кг

Answer 2

Calculating the Mass of a Birch Beam

To calculate the mass of the birch beam, we can use the formula:

Mass = Volume × Density

First, we need to calculate the volume of the birch beam.

Calculating the Volume of the Birch Beam

The volume of the birch beam can be calculated using the formula:

Volume = Length × Width × Height

Given: - Length = 10 cm - Width = 5 cm - Height = 25 cm

Let's calculate the volume: Volume = 10 cm × 5 cm × 25 cm

Calculating the Volume

The volume of the birch beam is: Volume = 10 cm × 5 cm × 25 cm = 1250 cm³

Converting Cubic Centimeters to Cubic Meters

To convert the volume from cubic centimeters to cubic meters, we divide by 1,000,000 (since 1 m³ = 1,000,000 cm³).

Volume = 1250 cm³ ÷ 1,000,000 = 0.00125 m³

Calculating the Mass

Now that we have the volume, we can calculate the mass using the given density of birch, which is 0.65 g/cm³.

Mass = Volume × Density Mass = 0.00125 m³ × 0.65 g/cm³

Converting Grams to Kilograms

To express the mass in kilograms, we need to convert from grams to kilograms. Since 1 kilogram is equal to 1000 grams, we divide the mass in grams by 1000.

Mass = (0.00125 m³ × 0.65 g/cm³) ÷ 1000

Let's calculate the mass in kilograms: Mass = (0.00125 m³ × 0.65 g/cm³) ÷ 1000 = 0.0008125 kg

Answer

The mass of the birch beam with dimensions 10×5×25 cm, and a density of birch wood at 0.65 g/cm³, is approximately 0.0008125 kilograms.