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The power of a motor pump is 2 kW. How much water per minute can the pump raise to a height of 10 m? (Given g = 10 m/s²)

a. 10 L/min
b. 20 L/min
c. 30 L/min
d. 40 L/min

1 Answer

3 votes

Final answer:

The pump can raise 12 kg of water to a height of 10 m per minute.

Step-by-step explanation:

To calculate the amount of water that the pump can raise to a height of 10 m per minute, we need to first calculate the work done by the pump.

The work done by the pump is given by the equation:

Work = Power x Time

Since we are given the power of the pump as 2 kW and we want to find the amount of water per minute, we can rewrite the equation as:

Work = Power x Time/60

Next, we can calculate the work done by the pump using the equation:

Work = mgh, where m is the mass of the water, g is the acceleration due to gravity, and h is the height.

Since we want to find the amount of water per minute, we can rewrite the equation as:

Work = (mass of water per minute) x g x height

Finally, we can rearrange the equation to solve for the mass of water per minute:

(mass of water per minute) = (Power x Time/60) / (g x height)

Substituting the given values, we get:

(mass of water per minute) = (2 kW x 60 s/60) / (10 m/s² x 10 m)

(mass of water per minute) = 12 kg/min

Therefore, the pump can raise 12 kg of water to a height of 10 m per minute.

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