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Beryllium has a density of 1.83g/cm^3 and a molar mass of 9.01g/mol. A slab of beryllium...

Beryllium has a density of 1.83g/cm^3 and a molar mass of 9.01g/mol. A slab of beryllium of thickness 1.4 mm and width 1.2 cm carries a current of 3.75A in a region in which there is a magnetic field of magnitude 1.88 T perpendicular to the slab. The Hall voltage is measured to be 0.130 uV. a) Calculate the number density of the charge carriers. b) Calculate the number density of atoms in beryllium. c) How many free electrons are there per atom of beryllium?

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