Why earth rotation is lower?

THE EARTH ROTATION IS LOWER.

 BUT WHY?

Well you may be surprised, but the answer is 'yes': land is turning more and more slowly, and not every day are the same length, producing speed variations for different reasons. The most important is the Moon by its gravitational effect and especially by tidal movements which causes that a force (in the opposite direction) appears that slowly rotated. It is gradually slowing the speed of rotation of our planet at an average of approximately 55 nanoseconds per day. There are other imbalances that advance or delay the Earth alternatively, in cases such as earthquakes, hurricanes and even thaws.

Earth will turn more and more slowly, but will never stop completely. The speed of rotation of the Earth right now is 24 hours but within about 4 million years we will have one more hour ie 25 hours. It is estimated that 5,000 million years one day last 48 hours.

A second is not, for people, very representative, but for fields such as telecommunications and aviation transport, where, for example, that difference may affect GPS aircrafts. A second can mean millions of dollars transacted.


These changes usually are made daily on June 30 or December 31. Every year there is a delay of 0.4 seconds (the day has a normal duration of 86,400 seconds), and this phenomenon could represent significant changes. The Earth 400 millions years ago it rotates  22 hours long,200 millions years ago it rotates 23 hours long ,now it rotates 24 hours long and in 400 millions years it will rotate 26 hours long.

      

Press hear to see a video

https://youtu.be/xUQKrUpQeXQ  

                                                             

Alba Merino 1º C