document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=750403>Question 750403</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The electrical resistance of a wire varies directly as its length and inversely as the square of its diameter. A wire with a length of 200 inches and a diameter of one-quarter of an inch has a resistance of 20 ohms. Find the electrical resistance in a 500 inch wire with the same diameter. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #456568 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=456568\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The electrical resistance of a wire varies directly as its length and inversely<BR>\n" );
document.write( " as the square of its diameter. <BR>\n" );
document.write( "A wire with a length of 200 inches and a diameter of one-quarter of an inch has<BR>\n" );
document.write( " a resistance of 20 ohms. <BR>\n" );
document.write( "Find the electrical resistance in a 500 inch wire with the same diameter.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "let r = the resistance of a 500\" wire<BR>\n" );
document.write( "Since resistance varies directly with length and the diameter is the same we can:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2F20 ALIGN=MIDDLE  ALT=\"r%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=500%2F200 ALIGN=MIDDLE  ALT=\"500%2F200\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cross multiply<BR>\n" );
document.write( "200r = 20*500<BR>\n" );
document.write( "Divide thru by 20<BR>\n" );
document.write( "10r = 500<BR>\n" );
document.write( "r = 500/10<BR>\n" );
document.write( "r = 50 ohms </SPAN>\n" );
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