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.
Jurisdiction is the authority of a court to hear and decide a specific action. It is based on the case of Marbury v. Madison, which basically held that the judiciary had the right and power to determine whether the laws and actions of the other two divisions (legislature, executive) are constitutional.