A 2 kg apple is at rest on the floor at the bottom of a staircase. How much work would be necessary to bring that apple up to the top of the staircase which is 8 meters high? Answers:
16.0 J
160 J
64.0 J
640

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 sound characteristic is not affected by the relative motion of an object

You can melt ice by applying pressure because the solid/liquid line has a slope.