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cross section. K for a concave hemisphere is about 0.00389 (see fig. 7). 

( 4) Oonvero hemisphere.- For a hemisphere with the convex side facing the direction of motion or pointing against the wind the 

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resistance is much less than for the concave hemisphere shown in figure 7. The resistance of the convex hemisphere is much less than t.hat of a flat plat of the same cross section or exposed area. Th~ coefficient of resistance is found to be about 0.00082 (see fig. 8}. 

