A water balloon is dropped from a window from some height above the ground. If it takes the balloon 1.9 seconds to reach the ground, how high is the window?

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 subatomic particle has a negative charge

Which situation will produce the greatest change of momentum