An object is moving in a circular path of radius 4.00 m. If the object moves through an angle of 1.2 radians, then the tangential distance traveled by the object is
A. 2.8 m.
B. 3.2 m.
C. 3.8 m.
D. 4.3 m.
E. 4.8 m.
E. 4.8 m.
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A long straight metal rod has a radius of 2.0 mm and a surface charge of density 0.40 nC/m2 . Determine the magnitude of the electric field 3.0 mm from the axis
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