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  3. 3 figure 3 shows an annulus of mean radius a...

Question: 3 figure 3 shows an annulus of mean radius a...

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3. Figure 3 shows an annulus of mean radius a and thickness t which varies with the angle θ according to the equation t = to(1 + λ cos θ) , where l is a constant. Assuming that the annulus is thin (to < a), find the x-coordinate of the centroid of the shaded area. Figure 3

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