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A
.gov website belongs to an official
government organization in the United States.
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A lock (
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connected to the .gov website. Share sensitive
information only on official, secure websites.
Two systems interacting (colliding, in this example). The systems have properties of size, shape, composition, position and velocity, some or all of which will be transformed as a result of the interaction. The transformation is dependent on the context in which the interaction takes place; here the context includes gravity, friction, elasticity, inertia, temperature and space–time. Within a different context, the interaction will have a different resultant transformation.
