1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Volume in water problem

  1. Nov 2, 2004 #1
    A small sculpture made of brass (density = 8470 kg/m cubed) is believed to have a secret central cavity. The weight of the sculpture in air is 15.76N. When it is submerged in water, the weight is 13.86 N. What is the volume of the secret cavity?
  2. jcsd
  3. Nov 2, 2004 #2


    User Avatar
    Homework Helper

    what have you done?

    you must be familiar with archimedes principle, i suppose.

    Well you know the buoyant force is equal to the mass of the fluid displaced times gravity. When the object is submerged, its weight is less due to the buoyant force.

    Use the relationship [itex] \rho = \frac{m}{v} [/itex] in the problem, and remember the volume of the fluid displaced is equal to the volume of what is submerged (in this case the entire object).
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Volume in water problem
  1. Volume problem (Replies: 13)

  2. Estimate Water Volume (Replies: 3)