I hope this not a dumb question. In t.v. programs I see about String Theory there is something vibrating or oscillating. What's vibrating or oscillating I don't know, but what is causing the vibration or oscillation.
When releasing two different objects at the same time, the objects will travel at a constant speed towards the Earth no matter the mass. I have a hard time believing this. If I were to release a brick and a feather at the same time, the brick will reach the ground before the feather. I know...