How is heavy water different from normal water a hydrogen atom in heavy water has an extra neutron an oxygen atom in heavy water was an extra proton an oxygen atom in heavy water has an extra neutron a hydrogen atom in heavy water has an extra proton

It's

normal water has only one proton while heavy water (deuterium oxide) has a proton and a neutron

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.