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Time
This category is for questions about the methods humans go about measuring the passage of time. You can also find questions about converting one unit of time to another.
9,512 Questions
How many seconds are in 60 days?
60 days * (24 hr / day) * (60 min / hr) * (60 sec / min) = 5,184,000 sec
What is the Metric unit for measuring time?
The second [ s ]
And the multiples or decimal fractions afforded by the SI prefix system:
yotta Y 1000000000000000000000000
zetta Z 1000000000000000000000
exa E 1000000000000000000
peta P 1000000000000000
tera T 1000000000000
giga G 1000000000
mega M 1000000
kilo k 1000
[hecto h 100] Not in the SI system but used in every day affairs)
(none) (none) 1
[deci d 0.1] Not in the SI system but used in every day affairs)
[centi c 0.01] Not in the SI system but used in every day affairs)
milli m 0.001
micro μ 0.000001
nano n 0.000000001
pico p 0.000000000001
femto f 0.000000000000001
atto a 0.000000000000000001
zepto z 0.000000000000000000001
yocto y 0.000000000000000000000001
How many milliseconds in 1 second?
Google says there's 1,000 milliseconds in 1 second... i don't know about you but i ain't arguing with Google ;)
There's an average of 365.25 days in a year. There are 7 days in a week, so 365.25/7 is 52.178, so approximately 52 weeks in the year.
What is 371 hours after nine o'clock am on January 18?
371 hrs is 15 days and 11 hours. There are 31 days in january, so jan 18 + 15 days is 2nd of feb. 9am+11 hours is 8pm. It will be 8pm on 2nd of February.
When did you start the next day at twelve am?
There is no 12:00 AM. Midnight is properly 12:00 M, just as noon is 12:00 N, computer convenience notwithstanding.
Most people in the US still use 12 am and 12 pm to refer to midnight and noon (respectively). The current day ends at exactly midnight (12:00 am) and the next day begins right after that. You could say that the next day starts the first millisecond just after the clock strikes 12:00 am (midnight).
How many seconds are in 5 minutes?
60 seconds/minute times 5 minutes = ...................you do the arithmetic!
How do you tell time on a wristwatch with arrows instead of numbers?
The arrows are called "hands".
There may be two or three of them.
If there are three then the thinnest (and possibly the longest) is the second hand. It denotes the seconds and is the one which moves most rapidly around the face of the watch.
If there are three then the next longest, or the longest if there are only two, is the minute hand. it denotes the minutes.
The remaining hand - always the shorter of two, or the shortest of three - and usually broader then the other(s), is the hour hand.
To tell the time the watch face is usually marked in divisions of 12 units around the face, starting in the uppermost position with 12, and proceding, to the right, 1, 2, 3 and so on around to 11. These are the hours and the watch will complete two full circuits in a day.
The hour hand points to one of these numbers on the appointed hour and the minute hand points at 12 - which also denotes 00 minutes. As minutes pass the minute hand moves slowly towards the position marked with a 1. These marks need to be multiplied by 5 to convert their meaning to minutes, so that when the hour hand is pointing at a little past the 12 mark, and the minute hand is pointing at 1 the time is 5 past 12. as the minute hand completes a rotation of the watchface an hour passes and you will notice the hour hand creep slowly from 12 towards the 1 mark.
If there is a second hand on the watch, the hours marks also need to be multiplied by 5 to convert their value to seconds, so that when the second hand is pointing at 4, it is denoting 20 seconds.
