Conundrum of Mass and Energy
- From: BottleBob <bottlbob@xxxxxxxxxxxxx>
- Date: Fri, 27 May 2005 01:56:23 GMT
To All:
Someone proposed this problem in another newsgroup and I thought I'd
relay it here for comment. Here's the problem as given:
============================================================
You have a 1 meter diameter spherical surface of
Unobtanium 597. It has no mass.
This material is 100% reflective in the entire electromagnetic
spectrum, has zero thermal conductivity, infinite strength and
reflects all known particles as well.
Inside this sphere is a 10 kilogram fissionable mass,
triggered to explode in a nuclear fireball at a huge efficiency
*at a random time*.
When it goes off half it's mass will, in the end,
become photons of various sorts and the particles that
remain will all be neutrons (and thus not interact with
the photons). The photons just keep bouncing off
the inside of the sphere ......
How much does the sphere and it's contents mass? When?
============================================================
Now disregarding that a 10k fissionable mass will not convert half it's
mass to photons... still *IF* it did, will the sphere mass the same or
less after the "explosion"?
--
BottleBob
http://home.earthlink.net/~bottlbob
.
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