Crossed-field velocity selector
A crossed-field velocity selector has a magnetic field of magnitude 0.045 T. The mass of the electron is 9.10939 × 10^-31 kg. What electric field strength is required if 86 keV electrons are to pass through undeflected?
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Puerto International has a branch in Mexico that manufactures a garage door alarm for people with mountain bike racks that fit on the top of their cars.
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