Posterous theme by Cory Watilo

2.21 and 2.22

2.21 and 2.22

24 November 2010

10:40

·         2.21 recall that insulating materials can be charged by friction

·         2.22 explain that positive and negative electrostatic charges are produced on materials by the loss and gain of electrons

Instructions

·         Launch the application on this website:

http://phet.colorado.edu/en/simulation/balloons

 

 

Image001

·         Rub the balloon on the sweater

·         Stick it on the wall

·         Charge a second balloon

·         Move it close to the first balloon

 

Questions

·         Why does the balloon get charged?  Take a screen shot to illustrate your answer

·         What happens when you move the balloons together?  Why?  Take a screen shot to illustrate your answer