A thin ribbon of a silver alloy 2.00-cm wide and 0.015 0-mm thick carries a current of 6.98 A perpendicular to a magnetic field. The Hall voltage is found to be 1.24 × 10^?4 V when the magnetic field is 2.50 T. Calculate n, the number of charge carriers per cubic meter
5.86 × 10^28/m3
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The protons and neutrons that make up normal matter belong to a family of subatomic particles called _____
A) embryons B) tachyons C) rayons D) baryons
How much current will be flowing through a 40.0 m length of cylindrical metal wire with radius 0.0 mm if it is connected to a source supplying 16.0 V? The resistivity of this metal is 1.68 × 10-8 ? ? m
A) 1200 A B) 9.5 × 108 A C) 68 nA D) 710 A
A +7.00 ?C point charge and -9.00 ?C point charge are placed along the x-axis at x = 0.000 cm and x = 40.0 cm, respectively
Where must a third charge, q, be placed along the x-axis so that it does not experience any net electric force due to the other two charges? A) -0.200 m B) 2.99 m C) -0.187 m D) -2.99 m E) 0.187 m
Rocks formed by cooling from a molten state are
A) precipitated rocks. B) igneous rocks. C) sedimentary rocks. D) metamorphic rocks.