It depends on which grenade you are using. The U.S. M67 Fragmentation Grenade currently in use by the military has a fuse that burns in 3-5 seconds. The fuse that ignites the grenade can be used on all other grenades (smoke, CS, etc.) of U.S. design. Other grenades of different origin may take more or less time. I don't believe any grenade will have a 12-second fuse, though. That would be impractical, because it would give the enemy more than enough time to take cover or even throw it back. The rule of thumb with grenades is 5 seconds, and when in doubt, remember Murphy's Law: "All five second fuses burn in three seconds".
By getting 20 kills with last stand. (last stand pro is when you can use equipments when you are in last stand such as grenades and claymores)
You are supposed to divide the total amount of hydrogen, by the consumption per second. That will give you the time in seconds. You can then convert that to years, by dividing by the number of seconds in a year.
4-5 seconds
0.3 seconds
4-5 seconds
It can last anywhere from 120 - 1200 seconds.
The Ford F2 50 trailer wiring fuse will be one of the auxiliary fuses in the fuse box. The auxiliary fuses will be the last four fuses in the second column.
The duration of The Last Polka is 3240.0 seconds.
The duration of The Last Holloween is 1500.0 seconds.
The duration of The Last Princess is 2700.0 seconds.
The duration of Last Friends is 3600.0 seconds.
The duration of Dead Last is 2580.0 seconds.