[填空题]
A horizontal compass is placed 18 cm due south from au 7+c g5bas 859fbvepl straight vertical eey if4ri+ q1 sc9eu38dp3dn b 2bd8k*wire carre 8c i npi*ubfy38kdr q4e+3e9 dd21bsying a 35-A current downward. In what direction does the compass needle point at this location? Assume the horizontal component of the Earth’s field at this point is $0.45\times10^{-4}\mathrm{~T}$ and the magnetic declination is 0$^{\circ}\,$. $^{\circ}\,$ N of W
