FutureStarr

A How Many Seconds in an Hour

## How Many Seconds in an Hour

There are 86,400 seconds in an hour. So, for example, suppose it takes 86,400 seconds for you to walk 3. 1 miles. What does that mean? How many seconds in an hour?

## Hour

via GIPHY

Thanks to documented evidence of the Egyptians' use of sundials, most historians credit them with being the first civilization to divide the day into smaller parts. The first sundials were simply stakes placed in the ground that indicated time by the length and direction of the resulting shadow. As early as 1500 B.C., the Egyptians had developed a more advanced sundial. A T-shaped bar placed in the ground, this instrument was calibrated to divide the interval between sunrise and sunset into 12 parts. This division reflected Egypt's use of the duodecimal system--the importance of the number 12 is typically attributed either to the fact that it equals the number of lunar cycles in a year or the number of finger joints on each hand (three in each of the four fingers, excluding the thumb), making it possible to count to 12 with the thumb. The next-generation sundial likely formed the first representation of what we now call the hour. Although the hours within a given day were approximately equal, their lengths varied during the year, with summer hours being much longer than winter hours.

Once both the light and dark hours were divided into 12 parts, the concept of a 24-hour day was in place. The concept of fixed-length hours, however, did not originate until the Hellenistic period, when Greek astronomers began using such a system for their theoretical calculations. Hipparchus, whose work primarily took place between 147 and 127 B.C., proposed dividing the day into 24 equinoctial hours, based on the 12 hours of daylight and 12 hours of darkness observed on equinox days. Despite this suggestion, laypeople continued to use seasonally varying hours for many centuries. (Hours of fixed length became commonplace only after mechanical clocks first appeared in Europe during the 14th century.) (Source: www.scientificamerican.com)

## Related Articles

• #### Killing of a sacred deer

May 29, 2022     |     m basit
• #### Amanda Grace

May 29, 2022     |     sajjad ghulam hussain
• #### John DiMaggio and the Bender Revival on Hulu

May 29, 2022     |     Future Starr
• #### How to watch TikTok without app

May 29, 2022     |     Future Starr
• #### Hard Knocks 2021

May 29, 2022     |     Amir jameel
• #### Ray Mcelrathbey:

May 29, 2022     |     Future Starr
• #### A Ft to Miles

May 29, 2022     |     Amir jameel
• #### escort babyloon

May 29, 2022     |     sajjad ghulam hussain
• #### Igglybuff

May 29, 2022     |     sajjad ghulam hussain
• #### What Is a Gritor

May 29, 2022     |     Muhammad basit
• #### Night at the Museum 2

May 29, 2022     |     Mohammad Umair
• #### How did dj khaled get famous

May 29, 2022     |     Future Starr
• #### Boscovs

May 29, 2022     |     umer nawaz
• #### Mr meaty show

May 29, 2022     |     M HASSAN
• #### Liv and maddie cast

May 29, 2022     |     abdul basit