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Newtonian Gravitational Constant Re-measured

Newton's appleNewton’s gravitational constant has been re-measured and is now estimated to be 6.67545(18)×10-11  m3 kg-1 s-2 with a standard uncertainty of 27 ppm. This is about 0.02 percent larger than the current standard.

What does this mean?

As it turns out, this larger Newtonian value indicates that things accelerate, due to the gravitational constant (G), just a smidgeon faster than was previously thought. So, Newton’s apple probably did a little more brain damage than his doctor reported. Or his apple weighed a little less than was stated in the police report.

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Popular Science Shuts Off Article Comments

Popular Science MagazinePopular Science, one of the most popular mainstream science magazines, today announced that it’s online service at will be shutting down its comments section for most of its online articles, and that this move is being made because, to quote them, “comments can be bad for science”.

Well! Energy Vat certainly invites your comments here over this development.

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Excess Energy through the Conservation of Angular Momentum?

Conservation of Angular Momentum

Conservation of Angular Momentum

Scientist have long known about the conservation of angular momentum. But, is it possible to obtain excess energy through the manipulation of this process? This article will explore that possibility.

Under the law of conservation of angular momentum (see illustration at left), any mass that has been accelerated to a set and certain revolutions per minute (rpm), and lacking any outside resistance, will maintain that speed indefinitely. The rate of rotational speed decay of a centrifuge is directly related to the amount of friction acting on the centrifuge. This friction might come from air resistance and/or bearing friction.

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