A hollow metal sphere has inner radius a and outer radius b. The hollow sphere has charge 2 Q. A point charge Q sits at the center of the hollow sphere. You may want to review (Page 658) . For help with math skills, you may want to review:

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

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

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.