1. It is because the electrons are much, much lighter than the protons.

2. A photocopier copies photos by negatively charging the toner. A new car is painted by firmly sticking paint that is given an electric charge. And an electrostatic air filter runs by attracting the particles in the air. The filter has an electric charged plate inside it.

1. Well, the smallest unit of a material that still has the characteristics of that material is an atom, and an atom has two electrons, one proton and neutron. Proton is in the middle of the atom and the electrons are place in the outside part of the atom. Also, electrons are much lighter than the protons so because of that, electrons can move easlity and prtons cannot.

2. In the book, it says that static charges can be used in technology, such as photocopy machine and making cars, electrostatic air filter...etc

1. An atom is composed of electrons, protons, and neutrons. Protons are tightly bount together with neutrons to form the nucleus at the center of an atom. The electrons go around the nucleus in random directions. I think protons cannot easily move from one atom to another because they are held too tightly in the nucleus of an atom.

2. This is only my thought, and it might be outrageous, but  I think it can be used to make a magnetically levitated train. by using a very strong static charge. Also, I think we can use it for recycling. If we can make an electrostatic air filter, why not use it to classify trash?