i wound an alarm clock to 9am. if i slept at exactly 8pm how many hours is my sleep before it will ring?
458696
it will go off at 9pm.  If you had to wind it, the alarm clock can't distinguish between am & pm.  It's not that high tech.  So you'll sleep one hour.
1151642
I'd say 10:30 or 11\nanytime after that you're probably just sleeping over at a friend's house...
90142
til the age 18 you are suposto get 9 hours of sleep  it should be at night bed time should 10 pm and you should wake at seven...no booze tobacco caffine drugs before sleep or you wont get the best sleep you can\n\nwhen you wake in the morings open the blids and  let in light natural light...this leads to better days overtime...even at first really
1147769
10:00am to 5:00am, the confusing part doesn't come in until after 12:00pm (noon).  1:00pm is 1300, 2:00pm is 1400, etc.  Up to that point, just put a : before the last 2 digits.
505242
I wake up at 6am everyday, and I usually wake up before my alarm goes off because I hate the sound of it. Some days I'm more awake than others, so on those days I just take it slower than normal.
239876
I suggest you get several different sounding alarm clocks with the loudest alarms you can find.. or perhaps borrow a few to find the one that will wake you.  Another alternative is to hire your local answering service to give you "wake-up" calls (and turn off the answering machine at night so they CAN wake you.  Different services will have different prices, so check around.  It's usually a flat fee per month, quarter or year.
1026869
Your body will know, always remember to go to bed the same day you wake up. My sources have told me that you should always go to bed by 11:00 PM I don't but that's my understanding. If you go to bed at the proper time you will wake up when your body no longer needs sleep.
358621
The amount of sleep needed varies from person to person but most require 8 hours.  You should sleep at least the number of hours it takes for you to wake up feeling rested and refreshed. For some people, this is 6 hours, for others, it is 10.  You have to find out what works for you.
1085314
Studies show that the number of hours is not the main factor - what is more important is the number of complete sleep cycles. Each sleep cycle lasts an average of 90 minutes and contains five distinct phases, which exhibit different brain-wave patterns: 65 minutes of normal, or non-REM (rapid eye movement), sleep; 20 minutes of REM sleep (dream state); and a further 5 minutes of non-REM sleep.  The REM sleep phases are shorter during earlier cycles (less than 20 minutes) and longer during later ones.  If we were to sleep completely naturally, with no alarm clocks or other sleep disturbances, we would usually wake up after a multiple of 90 minutes, e.g. after 4.5 hours, 6 hours, 7.5 hours or 9 hours, but not after 7 or 8 hours, which are not multiples of 90 minutes.\n\nA person sleeping only four cycles (6 hours) will feel more rested than someone who's slept for 8 to 10 hours but not been allowed to complete a cycle due to being woken up before it was completed.\n\nI have also heard from various sources that scientists are developing a new type of alarm clock that would detect the phase of your sleep and wake you when the current cycle is complete, so as not to disturb the cycle and ensure that you are as fresh upon waking as possible.  (I heard this over a year ago and have been waiting for its release, as I have a medical condition that means I am almost constantly fatigued.)
543257
30 miunte sounds the best, make sure you set the alarm clock!!
131355
move your alarm clock so that you can't reach it without getting up.   or place several alarms to go off one after the other so it would take too much effort to snooze them all.
190305
2am tommorow morning.I live in britain.Clocks go forward an hour
959166
No, whether you oversleep or undersleep, it doesn't change the next days sleep. You should get different amounts of sleep at different stages in your life but as a rule of thumb, get your 6-8 hours....whether or not you over/underslept the night prior.
322597
here's the deal.. \nIf you sleep over 8 hours.. You're over sleeping, and it makes you more tired or groggy. \ntry to sleep 7-8 hours.. set your alarm before you go to bed, getting out of bed is always the hard part.. so once your awake, your going to have to force yourself out of bed.. take a shower to wake you up.. and go for a walk or do some kind of physical activity after you're shower, that way.. you will have more energy throughout the day.. \nIf you don't want to exercise, most people dont.. even just making sure you only sleep 8 hours and dont oversleep will help.
42858
At least twice, usually I factor that in and set the alarm like 20 minutes before I really have to get up so when it goes off ofr the third time I really have to get up.
245238
9 hours is actually a very healthy amount to sleep. If you can, why not? 6 hours is too little
180853
if want to awake at aroung 6 morn than go to bed about 9 hours before coz doc advice to sleep 8 hours a day and it makes u fit and if make routine for 8 hours daily sleep gonna be your habit.