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Changing the Gravitational Constant

May 7th, 2017 by Math Tricks | No Comments | Filed in Gravity






Imagine if you can change the Gravitational Constant.  What fun you can have!  And, it would be very useful too:

 

Well, a couple of years ago, the Gravitational constant seemed like it was not so constant.  A variation of G was noticed, and this variation oscillated over a 5.9 year period:

Variable Gravitational Constant. Click the image to go to the Phys.Org article.

So, what can be causing this variation?  Most believe that it is not G that is changing.  Rather, this variation may be due to tidal forces and/or changes due to the circulation of the Earth’s molten core.  This is backed by seeing how the G variation correlates with the 5.9-year oscillatory period of Earth’s rotation rate.

Not everybody is in agreement, and further study is needed.  Go to the Phys.Org article to read more.

 

 

 

 

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Gravity Wave Generation Demonstration

August 14th, 2016 by Math Tricks | No Comments | Filed in Gravity






 

Gravitational waves were first detected on September 14, 2015 by both of the twin Laser Interferometer Gravitational-wave Observatory (LIGO) detectors, located in Livingston, Louisiana, and Hanford, Washington.  These waves were generated by a pair of black holes that orbited each other at very high speeds – close to the speed of light!

So how are these waves generated?  Steve Mould has made a model that (very impressively) demonstrates how these gravitational waves were generated:

 

 

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