1. Limited time only! Sign up for a free 30min personal 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!

How to mass an object that is less dense than air?

  1. Mar 8, 2012 #1
    How does one go about massing an object less dense than air (like a balloon), because gravity can then not be relied on?
     
  2. jcsd
  3. Mar 8, 2012 #2

    mathman

    User Avatar
    Science Advisor

    What do mean by "massing"? Note - "mass" is a noun, not a verb.
     
  4. Mar 8, 2012 #3

    Drakkith

    User Avatar

    Staff: Mentor

    Buoyancy! This page should help: http://hyperphysics.phy-astr.gsu.edu/hbase/pbuoy4.html#c2

    Just pretend you are weighing the object underwater and the page should work fine. If you want to do the calculations by hand you can find them on wikipedia's page on Buoyancy as well as on the first site linked.
     
  5. Mar 8, 2012 #4
    Having trouble understanding? Drakkith seemed to cope just fine.

    Thanks, just what I was looking for.
     
  6. Mar 8, 2012 #5

    Drakkith

    User Avatar

    Staff: Mentor

    It's important to always be clear as to what you are asking.
     
  7. Mar 8, 2012 #6
    Place the object on a digital scale inside of a vacuum chamber.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook