The same as all other bird eggs - 37.5C, give or take a quarter degree or so.
YES!
18 days
it takes about 18-22 days to hatch
57 degrees
You need an hen to hatch the egg not the bulb. Jokes apart if you want simulate warm condition suitable for an egg to hatch, you need to first know the right temperature required to hatch an egg. Then you need to get a suitable incandscent bulb of suitable wattage. It may be little higher than the body temperature of the hen.
when the female parakeet drop her egg, one of 2 things may happen: 1. it may hatch prematurely 2. it will break and kill what ever is inside; most commonly a female parakeet
roughly, 18 days. If the female/male sit on them like they should average would be about 18 days give or so a day or two.
There is no problem. The egg simply won't hatch. If there is no male parrot present, then the egg would not be fertilised anyway.
There is certain number of steps you need to make to hatch an egg. But you need to have an egg in your team.
No, I think that the male should remain in with the female to help her with the feeding of the babies.
if your parakeets egg dont hatch in about two weeks, it might mean that your baby parakeet has died or has gone rotten, or could have suffocated
It depends on the species of parakeet. Generally they take around 18-21 days.