Entrevista sobre a luta do anti-racismo no Brasil e no mundo.​

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Why are graphs useful when interpreting data

You can watch static electricity in action by rubbing an inflated balloon against your hair. your hair will actually stand on its end! it does this because each hair becomes charged, and they all repel one another.