document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1178647>Question 1178647</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The formula F=Kq1q2/r^2 gives the force between two point charges of q1 and q2 coulombs that are r metres apart. If two equally charged balls are placed 0.1m apart and the force between the balls is 9.8*10^-4 Newtons, calculate the charge on each ball to 2 significant figures, given K=9.0*10^9. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #807995 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=807995\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  The formula F=Kq1q2/r^2 gives the force between two point charges of q1 and q2 coulombs that are r metres apart. If two equally charged balls are placed 0.1m apart and the force between the balls is 9.8*10^-4 Newtons, calculate the charge on each ball to 2 significant figures, given K=9.0*10^9.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F=K%2Aq1q2%2Fr%5E2+ ALIGN=MIDDLE  ALT=\"F=K%2Aq1q2%2Fr%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "r= 0.1\r<BR>\n" );
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document.write( "F= 9.8*10^-4 Newtons,\r<BR>\n" );
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document.write( "K=9.0*10^9.\r<BR>\n" );
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document.write( "q=?\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F=K%2Aq1q2%2Fr%5E2+ ALIGN=MIDDLE  ALT=\"F=K%2Aq1q2%2Fr%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F=K%2Aq%5E2%2Fr%5E2+ ALIGN=MIDDLE  ALT=\"F=K%2Aq%5E2%2Fr%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9.8%2A10%5E-4+=+%289.0%2A10%5E9%29+%2A%28+q%5E2%2F+0.1%5E2%29 ALIGN=MIDDLE  ALT=\"9.8%2A10%5E-4+=+%289.0%2A10%5E9%29+%2A%28+q%5E2%2F+0.1%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=q%5E2+=+%28%289.8%2A10%5E-4%29+%2A%280.1%5E2%29%29%2F+%289.0%2A10%5E9%29 ALIGN=MIDDLE  ALT=\"q%5E2+=+%28%289.8%2A10%5E-4%29+%2A%280.1%5E2%29%29%2F+%289.0%2A10%5E9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+q%5E2+=+1.8+.10%5E-15 ALIGN=MIDDLE  ALT=\"+q%5E2+=+1.8+.10%5E-15\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "q= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3.5+%2A+10%5E-15 ALIGN=MIDDLE  ALT=\"3.5+%2A+10%5E-15\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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