Evaluate the electric field (magnitude and direction) at a height h above the center of a lat disk with inner radius a and outer radius b. the disk carries a radially-varying surface charge density, σ (s) = ks

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

1 the 4 is sig

the answer to this is proletariats.

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k2s for potassium sulphide