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!

Homework Help: Help with a solution

  1. Apr 18, 2006 #1
    I need help finding the solution to this problem...

    Suppose that the waterf exerts an average frictional drag of 1.0 X 10^5 N on a nuclear-powered ship. How far can the ship travel per kilogram of fuel if the fuel consists of enriched uranium containing 1.7% of the fissionable isotope 235U and the ship's engine has an efficieny of 20% (assume 208 MeV is released per fission event.)

    I know the answer is 2.9 X 10^3 km (1800 miles) I just don't know how to get to it.
  2. jcsd
  3. Apr 18, 2006 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    One is suppose to show one's work before asking for assistance.

    HINT: Thik about the definition of work done.

  4. Apr 18, 2006 #3
    i figured it out
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook