document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1188510>Question 1188510</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The acoustical intensity I of a sound wave is proportional to the square of the pressure amplitude P and inversely proportional to the velocity v of the wave. If I = 0.472<BR>\n" );
document.write( "W/ m2 for P = 25.0 Pa and v = 352 m/s, find I if P = 20.0 Pa and v = 320 m/s. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #819620 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=819620\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I=kP^2/v<BR>\n" );
document.write( "0.472=k*25^2/352<BR>\n" );
document.write( "so k=0.2658<BR>\n" );
document.write( "-<BR>\n" );
document.write( "use that in second part<BR>\n" );
document.write( "I=0.2658*20^2/320<BR>\n" );
document.write( "=0.332 W/m^2<BR>\n" );
document.write( " decrease in the numerator of 1/3 and decrease in denominator of about 0.1, so expect an overall decrease. </SPAN>\n" );
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