document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1023112>Question 1023112</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The power P obtained a windmill is directly proportional to the cube of the wind speed s.\r<BR>\n" );
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document.write( "a) Write an equation that expresses this variation.<BR>\n" );
document.write( "b) Find the constant of proportionality for a windmill that produces 96 watts of power when the wind is blowing at 20 mi/hr.<BR>\n" );
document.write( "c) How much power will this windmill produce if the wind speed increases to 30 mi/hr. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #638635 by </B><A HREF=/tutors/aboutme.mpl?userid=god2012><B>god2012(113)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=god2012><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=god2012><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=638635\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given : P is directly proportional to cube of windspeed S\r<BR>\n" );
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document.write( "P &#8733; s&#8963;3<BR>\n" );
document.write( " = ><BR>\n" );
document.write( "P = k*s&#8963;3 , where k is a constant\r<BR>\n" );
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document.write( "a)  k = {P/s&#8963;3}\r<BR>\n" );
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document.write( "b) speed s = 20 mi/hr<BR>\n" );
document.write( "   Power P = 96W<BR>\n" );
document.write( "   k = {96 / 20&#8963;3} = 96/8000 = 0.012<BR>\n" );
document.write( "   k = 0.012\r<BR>\n" );
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document.write( "c) s = 30<BR>\n" );
document.write( "   k = 0.012<BR>\n" );
document.write( "   P = k*s&#8963;3 = 0.012*30&#8963;3 = 324<BR>\n" );
document.write( "   P = 324 W\r<BR>\n" );
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document.write( " </SPAN>\n" );
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