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Physics 21 Online
OpenStudy (anonymous):

How much of the universe is believed to consist of ordinary atoms that can be detected? 75% 20% 3%

OpenStudy (anonymous):

About 3%. I won't reply to any more for about 45 mins - family guy is on. ;)

OpenStudy (anonymous):

i only have 3 more!

OpenStudy (anonymous):

Okay then. :)

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