Most adults need between 7-9 hours of sleep a night. Some may need less, and too much sleep can just make you feel more tired.
The National Sleep Foundation has a useful chart on their website for all age groups.
http://www.sleepfoundation.org/article/how-sleep-works/how-much-sleep-do-we-really-need
It varies from person to person and with lifestyle. Humans should get a little over 8 hours of sleep, but many don't.average normal is: about 8 to 9hrs..
10
Generally 8 hours of sleep for an adult. 9-10 for a teenager and 10-12 for a child.
You should never sleep with an eletric blanket.
Sleep TimeRecommended sleep time is eight hours a night, but some sleep more and some less.
10 days.
It depends on the person. It is an anesthetic.
If the pain of sleeping on it is tolerable then it should be ok to sleep on it.
Kids
5 hours a day
Get a night light, sleep with the lights on, or grow up.
the recommended number of hours a person should sleep is at least 6-8 hrs a day.