Question

Брусок поролона имеет 90 г. Определите массу 1 м3 поролона в километрах(Длина бруска 20 см, ширина 15, высота 10)

Answer 1

Объём бруска = 0,1*0,15*0,2=0,003 м^3
Масса 1 м^3 = 1*90/0,003 = 30000 г = 30 кг

Answer 2

Calculating the Mass of 1 m3 of Foam

To calculate the mass of 1 m3 of foam, we can use the given mass of the foam block and its dimensions.

Given: - Mass of foam block = 90 g - Length of foam block = 20 cm - Width of foam block = 15 cm - Height of foam block = 10 cm

We need to convert the dimensions to meters to calculate the volume in cubic meters.

Calculating Volume

The volume of the foam block can be calculated using the formula: \[ \text{Volume} = \text{Length} \times \text{Width} \times \text{Height} \]

Converting the dimensions to meters: - Length = 20 cm = 0.20 m - Width = 15 cm = 0.15 m - Height = 10 cm = 0.10 m

\[ \text{Volume} = 0.20 \, \text{m} \times 0.15 \, \text{m} \times 0.10 \, \text{m} = 0.003 \, \text{m}^3 \]

Calculating Mass of 1 m3 of Foam

To find the mass of 1 m3 of foam, we can use the given mass of the foam block and the calculated volume.

\[ \text{Mass of 1 m}^3 \text{ of foam} = \frac{\text{Mass of foam block}}{\text{Volume of foam block}} \]

Substituting the given values: \[ \text{Mass of 1 m}^3 \text{ of foam} = \frac{90 \, \text{g}}{0.003 \, \text{m}^3} = 30,000 \, \text{g/m}^3 = 30 \, \text{kg/m}^3 \]

The mass of 1 m3 of foam is 30 kilograms.