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<B><FONT face="Arial"><FONT color="#FFFF00"><FONT size="+2">Wind</B></FONT></FONT></FONT><FONT face="Arial"><FONT color="#FFFF00"><FONT size="+2"> (continued)</FONT></FONT></FONT></TD>
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<LI><B><FONT face="Arial"><FONT color="#FFFFFF"><FONT size="+0">So long as this buoyancy is positive (in the upward direction) the air will rise.<BR>
<LI>We have already seen how this occurs in lessons 3 and 4.<BR>
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