0
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
Why there is no year zero in our calendar?
Our system of numbering the year originated from the birth of Jesus Christ (hence the terms BC - Before Christ and AD - Anno Domini - in the year of Our Lord). This system did not become widespread for many years after Jesus ans so the years had to be counted back to when iit was believed he was born. However, there were two mistakes in the calculation; first, there was no year zero included (so the year before 1 AD was 1 BC) and, in any case, the year which they took to be Christ's birth was also wrong, his actually being born in or around what we call 4 BC. But the calendar, with its errors, stuck - and we have been using it ever since over 2000 years later.
How many minutes are there in four years?
525600 minutes in one year. You do the math. Multiply by 4.
How many hours in 400 minutes?
WHEN TRYING TO FIND OUT HOURS, YOU DIVIDE BY NUMBER OF MINUTES BY 60. SO 400 MINUTES EQUALS 6 HOURS AND 40 MINUTES
Who decided how much time equals a second a minute an hour?
Although history never defined a singular person, it is widely believed the Babylonians divided time into increments using a base system of 60, creating the basis for modern time as well still know it.
------- The Egyptians had subdivided daytime and nighttime into twelve hours each since at least 2000 BC, hence their hours varied seasonally. The Hellenistic astronomers Hipparchus (c. 150 BC) and Ptolemy (c. AD 150) subdivided the day sexagesimally and also used a mean hour (1/24 day), but did not use distinctly named smaller units of time. Instead they used simple fractions of an hour.
The day was subdivided sexagesimally, that is by 1/60, by 1/60 of that, by 1/60 of that, etc., to at least six places after the sexagesimal point (a precision of less than 2 microseconds) by the Babylonians after 300 BC, but they did not sexagesimally subdivide smaller units of time. For example, six fractional sexagesimal places of a day was used in their specification of the length of the year, although they were unable to measure such a small fraction of a day in real time. As another example, they specified that the mean synodic month was 29;31,50,8,20 days (four fractional sexagesimal positions), which was repeated by Hipparchus and Ptolemy sexagesimally, and is currently the mean synodic month of the Hebrew calendar, though restated as 29 days 12 hours 793 halakim (where 1 hour = 1080 halakim). The Babylonians did not use the hour, but did use a double-hour, a time-degree lasting four of our minutes, and a barleycorn lasting 3? of our seconds (the helek of the modern Hebrew calendar).
In 1000, the Muslim scholar al-Biruni gave the times of the new moons of specific weeks as a number of days, hours, minutes, seconds, thirds, and fourths after noon Sunday. In 1267, the medieval scientist Roger Bacon stated the times of full moons as a number of hours, minutes, seconds, thirds, and fourths (horae, minuta, secunda, tertia, and quarta) after noon on specified calendar dates. Although a third for 1/60 of a second remains in some languages, for example Polish (tercja) and Arabic (?????), the modern second is subdivided decimally.
The first attempt at creating a clock that could measure time in seconds was created by Taqi al-Din at the Istanbul observatory of al-Din between 1577-1580. He called it the "observational clock" in his In the Nabik Tree of the Extremity of Thoughts, where he described it as "a mechanical clock with three dials which show the hours, the minutes, and the seconds." He used it as an astronomical clock, particularly for measuring the right ascension of the stars.
http://en.wikipedia.org/wiki/Second
What are the benefits of time management?
Your life will be calmer and more enjoyable. In business it identifies productive behaviour and can help with making profits.
72 hours are how many days in a week?
There are 24 hours in one day. 24 x 3 = 72 That equals three days. One day is 24 hours, so 72 hours is three days.
What time is sunset on October 11 2008 in Pahrump nv?
Sunset in Pahrump, NV, 36° 27.241' N; 115° 24.112' W, on October 11 2008 was at 18:09:57 PDT. Depending on the viewer's exact location the local apparent sunset would be somewhat earlier due to the intervening No Pah mountain range. -Dicko@wormhole.com-
How many working minutes per day?
The usual working day is 8 hours (9 including breaks) (if you're lucky to get a job with the usual hours, usually public service here in ireland anyway).
8 hrs is 480 minutes.
How many seconds are there in 2 days?
One day is equal to 60 x 60 x 24 = 86400 seconds. Therefore, 2 days is equal to 86400 x 2 = 172800 seconds.
There are 60 seconds in one minute There are 3,600 seconds in on hour: 60x60
There are 86,400 seconds in one day: your answer from 60x60 x24
There are 172,800 seconds in two days: you answer 60x60 x24 x2
It's a 24 hour clock, so no AM or PM.
The first two digits are hours, second two are minutes.
The day starts at midnight, which is 2400 of yesterday and 0000 of today.
Everything after noon (or 12:59 PM to be precise), you just add 1200 to the time.
From midnight to 1 AM the hour is 00 (i.e. you subtract 1200 from civilian time.)
How many hours approx is 999 mins?
There are 60 minutes in an hour so 999 minutes is 16 hours and 39 minutes.
If you are working to the nearest whole hour this would be 17 hours.
How many years are in 500000 minutes?
500000 minutes ÷ 60 minutes/hour = 8333 hours
8333 hours ÷ 24 hours/day = 347 days
347 days ÷ 365.2425 days/year = 0.95 year
How many milliseconds in a year?
About 31.5 billion milliseconds
1 year
365 days
8,760 hours
525,600 minutes
31,536,000 seconds
31,536,000,000 milliseconds *more accurately * 31,558,464,000 milliseconds
What do we call for the instrument used to measure the time in ancient period?
answer the question pls pls pls pls pls pls pls pls pls pls pls q:what do we call for the instrument used to measure the time in ancient period? or the information about it. pls pls pls pls pls pls
