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Motors that use direct current (DC) voltage are found in many familiar items, such as electric shavers, battery-powered drills, and the fans in...

Motors that use direct current (DC) voltage are found in many familiar items, such as electric shavers, battery-powered drills, and the fans in...

Experimental Procedure Making Casein Plastic This experiment uses hot liquids, so an adult's help will be needed throughout. Using the masking tape...