Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   

<< Back to INDEX

Explaining the tides [Physics]
posted February 5 2013 18:54.35 by Giorgos Lazaridis

Every body knows that the Moon is responsible for the tides, which is true indeed. But since the earth rotates once per day, and the Moon "passes" from the same spot once per day (approximately), how comes and we have two high tides per day? The next video explains this phenomenon:

The water that is close to the Moon, is pulled by the gravitational pull of the Moon, so we have the first high tide which is easy to explain. Now, the water on the other side is pulled with a weaker force because of its greater distance (there is an Earth between....). But this alone does not explain the high tide at the other side right? Right!

This phenomenon was first explained by Newton in 1687. Its not the Moon that rotates around Earth, rather, the Moon AND the Earth rotate around a common center of gravity. Since Earth is bigger, much bigger, this center of gravity is much closer to the Earth, therefore we falsely perceive this motion as being the Moon that rotates around the Earth.

Therefore, the water on the far side is "pushed" towards space due to this rotation of the Earth around the Moon.

Others tried to explain this far-side high tide as a result of the rotation of the Earth around its axis of rotation, but this is absolutely false.

Bonus video - Two of the world-record breaking high tides!

[Link: Minute Physics]

You might also like...

Ten parts of our body being obsolete by evolution [Biology]

Does Volts or Amps Kill You? Voltage, Current and Resistance [Education]

Misconceptions About the Universe [Education]

TED-Ex talks about the lever

How 3D films work [Technology]

Boiling water at mountain Everest [Experiment]

How this horn-shaped speaker amplifies the sound passively?

Why we have two Nostrils? [Biology]

<< Back to INDEX



  Email (shall not be published)


Notify me of new posts via email

Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


No comment yet...

Be the first to comment on this page!

 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy