Posted by Mariah on Sunday, September 19, 2010 at 1:43am.
Assuming biological substances are 90% water and the density of water is 100 kg/meter cubed, estimate the mass of a fly, which can be approximated by a cylinder 4 mm long and 2 mm in diameter (volume (length*pi*radius squared)

physics  drwls, Sunday, September 19, 2010 at 2:04am
Multiply the volume of that cylinder by the density of water.
Your density is ten times too low. You'd better check it again.

physics  Mariah, Sunday, September 19, 2010 at 3:38pm
yes I meant the density was 1000 kg/meter cubed. but when I multiply the volume of the cylinder (12.56) by the density of water, (1000), i get 12560. the answer is supposed to be 1.131 X10 to the negative 5th power
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