Question

Водяной насос подаёт 300 литров воды в минуту на высоту 20 метров. Определитерации мощность двигателя насоса, если его КПД равен 80%

Answer 1

A1=mgh=pvgh
A2=P/t
КПД=A2/A1=0.8
A2=0.8*A1=0.8*pvgh
P=A/t
P=0.8*pvgh/t

Answer 2

Calculating the Power of the Water Pump's Engine

To calculate the power of the water pump's engine, we can use the formula:

Power (in watts) = (Flow rate (in liters per minute) * Total head (in meters) * Density of water * Gravitational constant) / Pump efficiency

Where: - Flow rate = 300 liters per minute - Total head = 20 meters - Density of water = 1000 kg/m^3 - Gravitational constant = 9.81 m/s^2 - Pump efficiency = 80%

Applying the Formula

Plugging in the given values: Power (in watts) = (300 * 20 * 1000 * 9.81) / 0.80

Calculating: Power (in watts) ≈ 735,750 watts

So, the power of the water pump's engine is approximately 735,750 watts.