7-8kgs are OK, but it does depend on drum size. If a 7kg washing machine's drum is smaller than a 5kg's drum, then that's silly. Of course some people are big families and do require large loads, hence there are needs for a larger washing machine.
Subject-matter jurisdiction. Subject-matter jurisdiction is the authority of a court to hear cases of a particular type or cases relating to a specific subject matter. For instance, bankruptcy court only has the authority to hear bankruptcy cases.
The subject of appearance is closely related to the subject of Personal Jurisdiction, which is the court's authority over an individual party. An appearance is some Overt Act by which the defendant comes before the court to either submit to or challenge the court's jurisdiction.