document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189073>Question 1189073</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A. The decibel level of sound is given by D=10log(I÷10^-12) where I is the sound intensity measured<BR>\n" );
document.write( "in watts per square meter<BR>\n" );
document.write( "1. Find the intensity of a sound which has a sound level reading of 125 decibels.<BR>\n" );
document.write( "2. Find the decibel of a whisper at an intensity of 5.4x10^-19.<BR>\n" );
document.write( "Computations and Answers: </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820308 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=820308\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=10 log (I/Io)<BR>\n" );
document.write( "12.5= log (I/io)<BR>\n" );
document.write( "raise to 10th power<BR>\n" );
document.write( "3.16x 10^12=I/Io<BR>\n" );
document.write( "Io=10^-12<BR>\n" );
document.write( "so I=3.16 w/m^2<BR>\n" );
document.write( "-<BR>\n" );
document.write( "For the second part, the intensity of a whisper is about 10^-10 decibels, 9 orders of magnitude higher than what is given, and if 10^-19 is used, the answer will be negative.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );