document.write( "Question 624829: If a plane was traveling the speed of light at 3×10 8 m/sec, how long (days) would the plane require to circumnavigate the Earth (diameter= 4.18×10 7 ft) ? How long would the plane require in microseconds? I need help setting up the problem \n" ); document.write( "
Algebra.Com's Answer #393116 by Alan3354(69443)\"\" \"About 
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If a plane was traveling the speed of light at 3×10 8 m/sec, how long (days) would the plane require to circumnavigate the Earth (diameter= 4.18×10 7 ft) ?
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\n" ); document.write( "Change meters to feet
\n" ); document.write( "1 meter = 3.21 feet
\n" ); document.write( "----
\n" ); document.write( "c = 3E8*3.21 = 9.63E8 ft/sec
\n" ); document.write( "d = r*t
\n" ); document.write( "d = 4.18E7*pi feet
\n" ); document.write( "d =~ 13.14E7 ft = 1.314E8 feet
\n" ); document.write( "t = d/r = 1.314E8/9.63E8 =~ 0.136 sec
\n" ); document.write( "= 1.36E-1 seconds
\n" ); document.write( "1 day = 86400 seconds
\n" ); document.write( "--> 1.36E-1/86400 days
\n" ); document.write( "=~ 1.5783E-6 days
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\n" ); document.write( " How long would the plane require in microseconds?
\n" ); document.write( "1.36E-1 seconds
\n" ); document.write( "= 1.36E5 usecs
\n" ); document.write( "= 136,000 usecs\r
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