Two unequal masses mm and 2m are attached to a thin bar of negligible mass that rotates about an axis perpendicular to the bar. when mm is a distance 2d from the axis and 2m is a distance dd from the axis, the moment of inertia of this combination is i. if the masses are now interchanged, the moment of inertia will be

(a) 2/3 i,
(b) i ,
(c)3/2 i ,
(d) 2 i ,
(e) 4 i

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?