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Classification Based on Buoyancy

33.The area o...

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33.The area of blade of windmill is 'A' if the air blow perpendicular to blade and density of air is 'rho' . The mechanical strength obtained by windmill is -

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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

ρ

, what is the mechanical power received by the windmill?

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, then the mass of the air of density

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t

Q. The blades of windmill sweep out a circle of area A . (a) if the wind flows at a velocity v perpendicular to circle , what is the mass of the air passing through in time t ? (b) what is the kinetic energy of the air ? (c) Assume that the windmill converts 25% of the wind's energy into electrical energy , and that A = 30m³, v = 36 km / h and the density of air is 1.2 kg m^-3. What is the electric power produced ?

Sara has designed the blades of a windmill as shown in the diagram above, the total area (in sq. cm) covered by the blades is.

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Classification Based on Buoyancy

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