What makes a model not useful? A.) if it is in proportion with the object it represents
B.) if it is made of a different material than the object it represents
C.) if it is not the same mass of the object it represents
D.) if it is out of proportion with the object it represents

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

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 of the following examples illustrates static friction? a box sits stationary on a ramp. a ball rolling on the lawn eventually comes to rest. a car rounds a curve on a road. a fish swims upstream.