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!

The problems with space

  1. Sep 26, 2006 #1
    The problems with space......

    Just pondering how you would measure an object's density when in space or a vacuum.....

    Was thinking attach it to a spring and use the spring constant but would a spring work in an area with a low gravitational field strength?

    What are other people's ideas?
  2. jcsd
  3. Sep 26, 2006 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    You need to apply a known force, then measure the acceleration of the body. You can do this with a spring (if you know the spring constant). It takes some practice but if you can stretch the spring and hold a constant length as the body accelerates you will be applying the needed constant force.
  4. Sep 27, 2006 #3
    do you use the natural frequency of the spring or look at the time period and root mass?
  5. Sep 27, 2006 #4
    a bit confused :s
  6. Sep 27, 2006 #5
    If the object is reasonable in size, insert it in your thermos bottle, then fill the thermos from a bottle filled to a known volume.

    Have 2 of your astronaut friends spin you while you're doing it if you're having trouble poring and stuff.

    Or use a syringe for the purpose instead, and inject water into the thermos till it's full and measure the displacement.
  7. Sep 27, 2006 #6
    As for the mass, use a centrifugal scales.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: The problems with space
  1. K space problem (Replies: 13)

  2. Space probe problem (Replies: 16)