Question: At what frequency does the mains voltage of 230 volts work in a country that is not the same as Greenland (the one whose elevation (above sea level) is 3694 metres) ?
Options:
6436 kilometre
60 hertz
63000
55 hertz
51.2 joule per mole-kelvin
50 hertz
230000 United States dollar
50
3 week
Incident at Victoria Falls