Question

При строительстве здания 30м3 песка поднимают на высоту 6 м за 49 мин. Какая мощность необходима для выполнения этой работы? Плотность песка ρ=1500кг/м3. (Принять ≈10 Н/кг). Ответ (округли до целого числа): ≈Вт. Пожалуйста пожалуйста

Answer 1

Ответ:

N=mght=30*1500*10*6*49*60=7938000000 =7938 МВт

Объяснение:

Answer 2

Calculating Power Required to Lift Sand

To calculate the power required to lift the sand to a height of 6m, we can use the formula:

Power (P) = Work / Time

Where: - Work = Force × Distance - Force = Mass × Acceleration

Given: - Volume of sand (V) = 30m³ - Height (h) = 6m - Time (t) = 49 minutes = 2940 seconds - Density of sand (ρ) = 1500 kg/m³ - Approximate acceleration due to gravity (g) = 10 N/kg

Calculating Mass of the Sand

First, let's calculate the mass of the sand using its volume and density:

Mass (m) = Volume × Density

Mass (m) = 30m³ × 1500kg/m³

Mass (m) ≈ 45000kg

Calculating Work

Next, we can calculate the work done in lifting the sand to a height of 6m:

Work (W) = Force × Distance

Work (W) = Mass × Acceleration × Distance

Work (W) = 45000kg × 10N/kg × 6m

Work (W) = 2700000J

Calculating Power

Now, we can calculate the power required using the work and time:

Power (P) = Work / Time

Power (P) = 2700000J / 2940s

Power (P) ≈ 918W

So, the approximate power required to lift the sand to a height of 6m in 49 minutes is 918W.