Is it $1 for every ad watched?
Henry: Nope it's not $1. It's probably a couple of pennies. Approximately 1,000 views is equal to $1. Obviously, it depends on various factors; advertisers, how much Google takes for their cut, etc…
You need about 100,000 views to get $100USD; give or take a couple thousand views.
Oh and don't forget that people who use adblocker don't see ads and thus you don't get any money for those views.
$1 for every thousand that recieve ads i believe. Could be wrong.
Nowhere near. You get nothing until many people have. Then you get far less than $1.
No, it depends on the amount paid by the advertisers.