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Yum. But what fruit's in season? 

Stephen Miles Uzzo, PhD.
VP, Science & Technology
New York Hall of Science
47-01 111th Street
Flushing Meadows Corona Park, NY 11368 USA
V +1.718.595.9177
F +1.718.699.5227








On Mar 14, 2013, at 5:34 PM, Geralyn Abinader wrote:

> Well, I know what'll be consuming me this evening. Thanks a lot. Geralyn
> 
> On Thu, Mar 14, 2013 at 5:07 PM, Eric Siegel <[log in to unmask]> wrote:
> A couple of pi questions on pi day:
> 
> 1) on a curve the ratio of the radius of a sphere to its circumference varies.  A line running from the north pole to the equator along the surface of spherical earth is 1/4 the length of the circumference at the equator.  Right?  Or am I missing something.
> 
> 2) even in planar geometry, I seem to remember reading that pi is variable depending on frames of reference.  Imagine a disk spinning at a significant fraction of the speed of light.  It gets shorter along the line of direction, in other words the circumference shrinks.  But a radius, which is not moving along the line of direction approaching the speed of light, doesn't shrink.  I think in Einstein's little book called Relativity this is an example he gives of how the "laws of nature" appear to change as you approach the speed of light.
> 
> Again, am I missing something?
> 
> Curiouser and Curiouser.
> 
> Eric
> 
> 
> 
> -- 
> Geralyn Abinader
> Producer
> NY Hall of Science
> 47-01 111th Street
> Queens, NY 11368
> (718) 699-0005 x581
> 
>  
> Now at NYSCI: Tony Hawk | RadScience, Feb 2 - Apr 22. Discover the physics of extreme sports!


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