What are uses of ac ac converter?

You can power your DC toys with the AC power plugs in the house. Like a Radio without using batteries.

When electricity was first invented it was all DC. But DC only travelled a short distance, AC was shown to travel far from the generator and still be useful. That is why most of the electricity...

By having a large power plant that serves a large area the electric can be produced cheaper than several small plants because of the economy of scale. High voltage electric transmission lines lose...

its a freaking band you idiot you dont "use it" you listen to them >.> moron

The water from an air conditioner you are referring to is known as condensation. This occurs when there is a difference in temperature between an object and the temperature of the air.