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Wind Mills

The blades of...

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The blades of a windmill sweep out a circle of area 2 m2. If the velocity of wind flows perpendicular to the circle is 18 km/h and density of air is 1.2 kg/m, then find the power of windmill.

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Q. The blades of a windmill sweep out a circle of area A. If the wind flows at a velocity v perpendicular to the circle and its density is

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