If two materials are made from different kinds of atomd, what else should you expect to be different? A. their charge of their protons
B. The mass of their electrons
C. the kinds of neutrons
D. the properties they have

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.