all night or at least a couple of hours
If you boil it, the water will evaporate. If you leave it boiling long enough, you should only have salt left.
You should leave your float plan for the weekend with a friend or relative.
Before beginning a long outing on eh water, always tell someone who is NT going with you where you intend to be, and when.
If you leave out plenty of food, water and things to do it should be ok to leave it for a week at most but make sure there is another rat, plenty of food and water as I said and no where for them to get out.
Only a bit longer than you could leave bottles of water in the same temperatures. Beer on average is about 4.5 to 5% alcohol by volume, but that is realtively little. It won't freeze as fast as water - but it will freeze not long after. Exactly how long is dependent on how cold it is, how well it is sheltered, etc.
It will die
It depends on the person, as long as they are responsible and don't loose things then they should have to be about 10.
It should be instant, and they have to be asleep. But at the max, roughly 2 minutes or so.
Yes it is just as bad as water!
As long as you want... I guess
Manatees spend their entire lives in water. They do not leave it.
Overnight