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Physics 8 Online
OpenStudy (anonymous):

In reaching her destination, a backpacker walks with an average velocity of 1.20 m/s, due west. This average velocity results, because she hikes for 6.73 km with an average velocity of 2.37 m/s due west, turns around, and hikes with an average velocity of 0.617 m/s due east. How far east did she walk (in kilometers)?

OpenStudy (anonymous):

What are two features that tells us that the lepton family structure exists?

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