a 3 kg model train going right at 2.8 m/s bumps into another 2 kg model train car moving in the same direction at 1.6 m/s. the heavier train car has a final speed of 2.2 m/s to the right. find the final speed of the lighter train car. state the law of conservation of momentum.

Felipe is saving money for a class trip. he already has saved $ 2 5 0 $250 that he will put toward the trip. to save more money for the trip, felipe gets a job where each month he can add $ 3 5 0 $350 to his savings for the trip. let m m be the number of months that felipe has worked at his new job. if felipe needs to save $ 2 7 0 0 $2700 to go on the trip, which equation best models the situation?

Explain how earth is like a giant bar magnet. how is our magnetic field made?

What is the leading cause if water scarcity throughout much of the world