What is the relation between galaxy brightness and the width of the emission lines?
Question 2
A uniform magnetic field is directed along the x axis. For what orientation of a flat, rectangular coil is the flux through the rectangle a maximum?
1.It is a maximum in the xy plane.
2.It is a maximum in the xz plane.
3.It is a maximum in the yz plane.
4.The flux has the same nonzero value for all these orientations.
5.The flux is zero in all cases.