Final answer:
After Paula and Ricardo push off from each other, they will both have the same magnitude of momentum, but in opposite directions, due to the law of conservation of momentum.
Step-by-step explanation:
When two ice skaters, Paula and Ricardo, push off from each other, the law of conservation of momentum states that the total momentum of the system before and after the push-off remains the same. Since Paula and Ricardo have different masses, we can determine the momentum of each skater using the formula momentum = mass * velocity. Immediately after the push-off, both skaters will have equal and opposite momentum, meaning that the skater with the greater mass (Ricardo) will have a lower velocity, and the skater with the lesser mass (Paula) will have a higher velocity. However, because momentum depends on both mass and velocity, both skaters will actually have the same magnitude of momentum but in opposite directions.