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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.






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: