A uniform electric field with a strength of 1 MV/m and a uniform magnetic field with an induction of 10-2 Tesla are created in the space region. The electric field strength vector is perpendicular to the magnetic field induction vector. A muon beam moves perpendicular to both vectors, which does not deflect under the combined action of the fields. What is the speed of the particles? Is it possible to use this experiment to determine the charge of a particle and its sign?

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