Unit 4 Activity 4 To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it. Demonstration: Charging by rubbing and Charging by contact Demonstration: Charging by rubbing and Charging by contact Exploration 1: Can two neutral insulators become charged by rubbing? Exploration 1: Can two neutral insulators become charged by rubbing? Exploration 2: Developing a triboelectric series Exploration 2: Developing a triboelectric series Return to Unit 4 Resources Page Copyright © 2020 LEAP