When is the cost-to-cost method an appropriate method to recognize revenues. What are some of the potential risks associated with this practice?

One of the important group of smart materials (inorganic) is based on the Perovskite structure. We will be discussing more of these structures several times in this class. (For those who have taken Ceramics or ME5311, this structure was discussed in class.) A) Use your Materials book (Callister or Askeland) to determine what is the Perovskite structure? For any simple perovskite, draw the unit cell showing the position of various ions. B) From first principles, estimate the theoretical density of this perovskite. C) Name some perovskite materials and their applications. D) Perovskites exhibitpiezoelectricbehavior. What isPeizoelecticbehavior and what are some preovskites that exhibit this behavior? E) These materials exhibit several other unique properties which we will discuss. One that is receiving quite a bit of attention recently isMagnetoresistanceandcolossal magnetoresistanceespecially in solar cells and energy harvesting. Use any source to define these terms and identify the difference between the two. What types of perovskites exhibit either type of behavior? If you cant find it in the book, just for this part, Google it. (They also exhibitFerroelectricbehavior, more on that later.)