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6.  Review Multiple-Concept Example 4 to see
the concepts that are pertinent here. In a television picture tube, electrons
strike the screen after being accelerated from rest through a potential
difference of 25 000 V. The speeds of the electrons are quite large, and for
accurate calculations of the speeds, the effects of special relativity must be taken into account. Ignoring such effects, find
the electron speed just before the electron strikes the screen.
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