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

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the