posted by Cherie .
I had to I an experiment where a balloon was tied to each end of a meter stick which was balanced on a pencil over two cans. I had to pop one balloon which caused the pencil, stick and other balloon to fall off the cans. I need to use particle theory to explain what happened in the experiment and I don't know how to do this. Part of the question was if air had any weight. I would appreciate any help in this. Thanks