Is it possible to view a given address say a friend's house in USA through street view on google earth?

Yes, individual houses can be a bit blurred depending on the quality of the photgraph.|||U can, but not certain it allows you to go as close as "house number" may have to do it to nearest street corner you knwo and look manually|||Very easy, you can see the whole world...good for if you are going on a trip can plan it better