9. an unbalanced force of 400 n is applied to a 10 kg object. what is the acceleration of the object?

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Which best describes the difference between internal and thermal energy?

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?