How many hits is a team allowed before the ball must travel back over the net

What is it called when countries build lots of weapons to store and them in case of a war?

Perculiarity of globalization for the global economy

Which of these coordinates is closest to mt. kilimanjaro? 2° s latitude; 30° e longitude 4° s latitude; 20° e longitude 34° s latitude; 20° e longitude 12° n latitude; 2° w longitude