This is true. The break handles and brakes are levers and the seat adjustment (raise or lower) is a screw.
Line Graph
Hope this is what you are looking for!
The correct answer would be compound
The plastic rod is made of insulator (plastic), so it does not allow charges moving from one sphere to another. This means that all the electrons given to sphere A will remain on sphere A.
The number of electrons initially given to sphere A is

, and since the charge of 1 electron is

, the net charge left on sphere A after the removal of the rod will be