about 2 hours
Between 30 mins and 4 hours.
Yes, it does eventually. It just takes a very long time. There are programs that can show you exactly how long you have to wait, and sometimes waiting is well worth it.
It lasts for an hour and a few minutes, do NOT sit and wait because it takes a looooong while, just watch T.V while you wait.
Depends on the make and model of car plus what speed you are braking at.