A fly is on hanging on the edge of one of the blades. Neglecting the width of the fan's motor, if the blades are 0.660 m long, what is the tangential speed of the fly?

There is not enough information to answer this question. We don't even know if the blades are moving.

Explanation:

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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