Question

Площадь дна кастрюли равна 1080 см2. Вычисли, на сколько увеличится давление кастрюли на стол, если в неё налить воду объёмом 3 л. Принять g=9,8 Н/кг. Ответ (округли до целого числа): давление кастрюли на стол увеличится на Па.

Answer 1

Ответ: 272кПа

Объяснение:

Дано:

S=1080см²=0,108м²

V=3л

g=9,8Н/кг

ρ=1000кг/м³

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ΔР-?

ΔР=ΔF/S=ρVg/S=1000*3*9,8/0,108=272222Па=272кПа

Answer 2

Calculation of Pressure Increase in the Pot

To calculate the increase in pressure in the pot when water with a volume of 3 liters is poured into it, we need to use the formula for pressure:

Pressure (P) = Force (F) / Area (A)

The force exerted by the water is equal to its weight, which can be calculated using the formula:

Force (F) = mass (m) * acceleration due to gravity (g)

Given that the volume of water poured into the pot is 3 liters, we can calculate the mass of the water using the density of water, which is approximately 1000 kg/m³.

Mass (m) = volume (V) * density (ρ)

Converting the volume from liters to cubic meters:

Volume (V) = 3 liters = 0.003 cubic meters

Substituting the values into the formula:

Mass (m) = 0.003 cubic meters * 1000 kg/m³ = 3 kg

The acceleration due to gravity is given as 9.8 N/kg.

Substituting the values into the formula for force:

Force (F) = 3 kg * 9.8 N/kg = 29.4 N

Now, we need to calculate the increase in pressure on the table when the water is poured into the pot. The area of the bottom of the pot is given as 1080 cm².

Converting the area from cm² to m²:

Area (A) = 1080 cm² = 0.108 m²

Substituting the values into the formula for pressure:

Pressure (P) = 29.4 N / 0.108 m²

Calculating the pressure:

Pressure (P) ≈ 272.22 Pa

Therefore, the pressure in the pot on the table will increase by approximately 272 Pa when 3 liters of water are poured into it.

Note: The answer has been rounded to the nearest whole number as requested.