Q: How do the masses of the spheres in Experiment 2 compare before and after the experiment? Alright, I'm a little confused what's going on here in this experiment. I'm assuming the glass rod attracts electrons to one side of the sphere towards the glass rod. No electrons are transferred during this process because they're not actually touching. However, I'm not entirely sure what would happen with the conducting wire between the two spheres. If electrons from sphere I flow towards the side where the glass rod is (leaving the other side slightly positive), do electrons from the second sphere travel to sphere I due to electrostatic attraction? The explanation just said one mass increases due to gaining electrons while the other decreases but didn't really explain what was going on. So could anyone please tell me if what I said is correct? Thanks.