Question

Решите: Рассчитайте силу с которой воздух давит на поверхность стола, длина которого равна 1,5м, ширина равна 1м, атмосферное давление равно 130кПа. Ответ дайте в килоньютонах (кН)

Answer 1

Ответ: 195кН

Объяснение:

Дано:

а=1,5м

в=1м

Р=130кПа=130000Па

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F-?

Р=F/S

F=PS=P*а*в=130000*1,5*1=195000Н=195кН

Answer 2

Calculating Air Pressure on the Table Surface

To calculate the force with which the air presses on the surface of the table, we can use the formula:

Force = Pressure × Area

Where: - Pressure is the atmospheric pressure in pascals (Pa) - Area is the surface area in square meters (m²)

Given: - Length of the table (l) = 1.5 m - Width of the table (w) = 1 m - Atmospheric pressure = 130 kPa

First, we need to convert the atmospheric pressure from kilopascals (kPa) to pascals (Pa) as the formula requires pressure in pascals.

130 kPa = 130,000 Pa

Now, we can calculate the force with which the air presses on the table surface.

Calculation

The surface area of the table (A) can be calculated as:

Area = Length × Width

Area = 1.5 m × 1 m = 1.5 m²

Now, we can use the formula to calculate the force:

Force = Pressure × Area

Force = 130,000 Pa × 1.5 m² = 195,000 N

To convert the force from newtons (N) to kilonewtons (kN), we divide by 1000:

Force = 195,000 N ÷ 1000 = 195 kN

Answer

The force with which the air presses on the surface of the table is 195 kilonewtons (kN).