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According to social exchange theory, altruistic behaviors benefit the individual who performs them.
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Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?
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What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.
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A particle with charge q and kinetic energy K travels in a uniform magnetic field of magnitude B. If...
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