What is the magnitude of the electric field, in newtons per coulomb, inside the copper of the shell, i. e., at a radius r from the center such that r2 < r < r3

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. 

increase masses, decrease separation

a sonic boom is a loud boom that breaks the sound barrier

explanation:

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y