Amicroscopic magnetic region composed of a group of atoms whose magnetic fields are aligned in a common direction is called a(n in most materials, when these groups are randomly distributed, the substance will show magnetism.

Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?