Question

2. Визнач масу рулону, який виготовлено з паперу товщиною 0,1 мм. Якщо рулон розгорнути, то отримаємо стрічку довжиною 20 м та шириною 50 см. Густина КГ паперу 800 кг/м³​

Answer 1

Ответ:

8кг

Объяснение:

р=800кг/м³; 0,1мм=0,0001м; 50см=0,5м; то V=0,0001×20×0,5=0,001м³;

m=pv; m=0,001×800=8кг

Answer 2

To determine the mass of the paper roll, we need to calculate the volume of the paper first. The volume can be calculated by multiplying the length, width, and thickness of the paper.

Given: - Thickness of the paper = 0.1 mm - Length of the paper strip = 20 m - Width of the paper strip = 50 cm

To calculate the volume, we need to convert the thickness from millimeters to meters and the width from centimeters to meters.

Converting the thickness: - 0.1 mm = 0.1/1000 m = 0.0001 m

Converting the width: - 50 cm = 50/100 m = 0.5 m

Now we can calculate the volume: - Volume = Length x Width x Thickness - Volume = 20 m x 0.5 m x 0.0001 m = 0.001 m³

The density of the paper is given as 800 kg/m³. To find the mass, we can use the formula:

Mass = Density x Volume

Substituting the values: - Mass = 800 kg/m³ x 0.001 m³ = 0.8 kg

Therefore, the mass of the paper roll is 0.8 kg.