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!

Mass of Earths water (simply)

  1. Jun 5, 2006 #1
    If I've been given the density of water, how do I go about calculating the mass of all the water on Earth.

    Of course, density = m/v, and whilst water covers 2/3 (?) of the Earths surface, how can I work this into the volume? Would it be the 2/3 * surface area of Earth * average depth of the oceans?

    This is assuming that sea water has the same density as fresh water (which is obviously not the case, but still - its what the question states)
     
  2. jcsd
  3. Jun 5, 2006 #2
    That equation is a good approximation if the surface area of the earth around the depth you are told is comparable to the surface area of the surface of the earth. I'm a little unsure what you're actually given in the question and what you're not, though.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Mass of Earths water (simply)
  1. Mass of the Earth (Replies: 6)

  2. Mass of water (Replies: 3)

  3. Mass of the Earth (Replies: 2)

Loading...