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The blades of a windmill sweep out a cir...

The blades of a windmill sweep out a circle of area A.
What is the kinetic energy of the air?

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`K= pAv^(3)t"/"2`
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The blades of a windmill sweep out a circle of area A. Assume that the windmill converts 25% of the wind's energy into electrical energy, and that A= 30 m^(2), v= 36 km/h and the density of air is 1.2 kgm^(-3) . What is the electrical power produced?

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NCERT GUJARATI-WORK, ENERGY AND POWER-EXERCISES
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  14. The blades of a windmill sweep out a circle of area A. If the wind f...

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  15. The blades of a windmill sweep out a circle of area A. What is the k...

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  16. The blades of a windmill sweep out a circle of area A. Assume that t...

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