I have to give a 5-7 minute speech on anything to do with math, science, or technology. the speech has to have visual aides too (not boring ones). Last time i did my speech on hypnosis. Another time i did mine on adrenaline. I'm thinking about doing wireless electricity or the science behind constructing a tennis racket or something like that. what are some cool, interesting topics that i could do my speech on? Witricity: explain witric..

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