document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1185399>Question 1185399</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Light travels about 2.998 x 108 meters per second. If the Sun and Earth are about 1.496 x 109 km apart, how long does it take light to travel to Earth? If the surface area of the Earth is 5.101 x 109 km2, and at any time about half of the Earth is covered in light, and there are approximately 3.6 x 1021 photons of light per m2, approximately how many photons of light are hitting the Earth at any moment? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #816241 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=816241\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Light travels about 2.998 x 108 meters per second.<BR>\n" );
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document.write( "Use ^ (Shift 6) for exponents and * (Shift 8) for multiply.<BR>\n" );
document.write( "eg, 2.998*10^8 </SPAN>\n" );
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