"john has been having difficulties getting out of bed. he is not interested in going out with friends, and does not even answer the phone. john has let a number of bills go unpaid, he is sleeping 12-14 hours a day, and he cannot concentrate at work. he has called in sick to work at least once each week. john is most likely suffering from a disorder."

John is most likely suffering from a dissociative disorder. Dissociative disorder, disorders in which conscious awareness becomes separated (dissociated) from previous memories, thoughts, and feelings.  Dissociative identity disorder (DID) while rare dissociative disorder in which a person exhibits two or more distinct and alternating personalities. Formerly called multiple personality disorder.

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves