Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Average Diameter of a Grain

  1. Sep 29, 2010 #1
    1. The problem statement, all variables and given/known data
    Find the Average Grain Diameter


    2. Relevant equations
    d= C/NLM


    3. The attempt at a solution

    My instructor hasn't defined what C or M are. I could easily solve this equation if I just knew which numbers I am supposed to substitute in for C and M. NL is the average number of intercepted grains determined by a 3, 3.5in line strategy. The number I have for it is 2.8grains/in.

    Any clues on to what C and M could stand for?
     
  2. jcsd
  3. Sep 29, 2010 #2
    Attached is the handout given to me that gives an example of what I am supposed to do on my assignment. Relevant information is on pages 9,10,11.
     

    Attached Files:

  4. Sep 29, 2010 #3

    berkeman

    User Avatar

    Staff: Mentor

    Hmm. That's weird that they don't seem to define C or M. Even in the paper you posted, they just seem to throw them into that equation without any description that I can see.

    I tried to see if Google could help, and it may be of help (but I didn't have time to go through all the hits yet). I Googled d=C/NM +grain, and got some good hits. Maybe have a look through some of the hits to see if they use that equation at all:

    http://www.google.com/search?sourceid=navclient&ie=UTF-8&rlz=1T4GGLL_enUS301US302&q=d=+C/NM++grain

    .
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook