We are now into Unit 7 of physics. For this unit we started
off basic by talking about protons, neutrons, and electrons. Protons are
positively charged. Neutrons are neutral. Electrons are negatively charged. We
learned that opposite charges attract, and similar charges repel. However, a
neutral and a neutral have no effect at all. We also talked about things like
conductors, semi conductors, and insulators. Conductors allow charges to move about more or less freely. Semi conductors can be
fine-tuned to display almost any desired degree of conductivity by controlling
the concentration of the various components from which they are made. Insulators
charge that are not free to move; most are nonmetallic substances and most are
good thermal insulators. In this video I am rubbing the balloon on my sisters
hair, and it makes her hair stand up. This is because the balloon is stealing
the protons from my sisters hair, it is getting charged.
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