Electromagnetism Questions

• Do atoms ever actually touch each other?
• How can it be so hard to drag rubber across smooth glass if friction is caused by surface roughness?
• How can you tell a black hole made out of antimatter from a black hole made out of matter?
• How do magnets heal?
• How do you focus regular light to make it a laser beam?
• How is a magnetic field just an electric field with relativity applied?
• Is it possible to create magnetic waves?
• What is the speed of electricity?
• What makes heat rise?
• Why are there so many different kinds of forces in chemistry?
• Why can't lightning strike the same place twice?
• Why do atoms always contain the same number of electrons and protons?
• Why don't atoms collapse if they are mostly empty space?
• Why don't objects fuse to my finger when I touch them?
• Why is a 12-volt household battery harmless, but the shock from a 12-volt car battery will kill you?
• Why is gravity the strongest force?
• Why were electrons chosen to be negatively charged? Wouldn't it make more sense to call electrons positively charged because when they move they make electricity?