A physics teacher rubs a glass object and a felt cloth together and the glass becomes positively charged. Which of the following statements are true? Choose ALL that apply. A.) In general, glass materials must have a greater affinity for electrons than felt materials.

B.) Charge is created during the rubbing process; it is grabbed by the more charge-hungry object.

C.) This event violates the law of conservation of charge.

D.) Electrons are transferred from glass to felt; protons are transferred from felt to glass.

E.) If the glass acquired a charge of +5 units, then the felt acquires a charge of -5 units.

F.) The glass gained protons during the rubbing process.

G.) Once charged in this manner, the glass object and the felt cloth attract each other.

H.) The felt became charged negatively during this rubbing process.