You are correct. I should have said: in microgravity there is no weight difference between materials. Therefore, the concept of heavy and light don't apply.
Phyllis Budka ---- countde...@earthlink.net wrote: > Phyllis wrote "in microgravity, there is no density difference between > materials because density, as a material property, depends on gravity. So, > the concepts of "heavy" and "light" don't apply. > > WT_ ! At the risk of showing my ignorance, am I missing something here? A 1cm > sq. solid of osmium (Os 22,610cm)) would have no difference in density in > microgravity than the same sized mass of lithium (Li 0,534cm)? Temperature > and pressure being constant. How does the absence of gravity change the > relative atomic mass(density)? > > Count Deiro > > -----Original Message----- > >From: abu...@nycap.rr.com > >Sent: Jan 28, 2010 8:44 AM > >To: meteorite-list@meteoritecentral.com > >Subject: [meteorite-list] Regmaglypts > > > >Steve and Everyone, > > > >Steve, Thank you! You are definitely on the right track as far as my thought > >experiment is concerned! > > > >I have the following comments: in microgravity, there is no density > >difference between materials because density, as a material property, > >depends on gravity. So, the concepts of "heavy" and "light" don't apply. > >My insights into gravity as a variable (The AHA! Moment) came from > >Springwater pallasite - a light material, olivine, surrounded by a heavy > >material, nickel-iron. > > > >I am careful not to mention the word "gas" because meteorites are supposed > >to have been "outgassed." > > > >Steve: "metals or other material with a higher melting point acting as the > >thin soap skin of the bubble." > >Phyllis: Yes for concept of "soap skin" BUT just the reverse for the melting > >(or solidification) point. > > > >Think solidification of a pallasite such as Springwater. On cooling / > >solidification, materials with higher melting points will form before those > >with lower melting points. Olivine begins to solidify before nickel-iron. > >They share a temperature range where neither is completely solid. On > >further cooling, olivine becomes solid while nickel iron is not yet > >completely solid. Iron-sulfur (troilite) will be among the last of the > >complex melt to solidify. Of course, there are many other compounds that > >solidify along the way, depending on the overall melt composition. > > > >In such a chemically complex system, the concept of "local composition" > >becomes important. This implies that there are small differences in > >solidification points and differences in local surface energy. For > >additional info, see my "Stepping Back in Time" article on my website, > >referenced earlier. Another AHA! Moment for me. > > > >Phyllis Budka > >http://meteormetals.com/ > > > >______________________________________________ > >Visit the Archives at > >http://www.meteoritecentral.com/mailing-list-archives.html > >Meteorite-list mailing list > >Meteorite-list@meteoritecentral.com > >http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
