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Homework Help: Buoyancy Problem

  1. Dec 2, 2005 #1
    A rectangular piece of wood ( 5.0 X 4.0 X 3.0 cm) and mass 42g is thrown into the oceon, how do i calculate the percentage of volume floating above the water?
  2. jcsd
  3. Dec 2, 2005 #2
    what determines if something floats?

  4. Dec 2, 2005 #3
    the density is 1.428 X 10^-3 kg/m3 for the wood, so it will float right completely above the ocean surface?
    Last edited: Dec 2, 2005
  5. Dec 2, 2005 #4
    is this right-??

    Volume submerged = Density of wood / Density of oceon water?
  6. Dec 2, 2005 #5
    have you ever seen something float right on the ocean surface?
  7. Dec 2, 2005 #6
    the submerged volume = the volume of water displaced.
    if you put a rock in a container of water, the water level rises.

    now, what does displacement have to do with floating?
  8. Dec 2, 2005 #7
    in this case i got the density of wood more than that of that oceon so i think it will sink!
  9. Dec 2, 2005 #8
    have you ever seen wood sink?
  10. Dec 2, 2005 #9
    how did you get the density for wood? do you have the right units?
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