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!

Differentials word problem

  1. Oct 8, 2009 #1
    1. The problem statement, all variables and given/known data

    Use differentials to estimate the amount of paint needed to apply a coat of paint 0.05 cm thick to a hemispherical dome with diameter 54 m.

    2. Relevant equations

    dy=dy/dx *dx

    Surface area of a hemishpere=2pi*r^2

    3. The attempt at a solution

    dy=4pi*r dx
    dy=4pi*27 *.05
    dy=16.96
     
  2. jcsd
  3. Oct 8, 2009 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    You want to express all of your numbers in the same units. 0.05 cm is not the same as 0.05 m.
     
  4. Oct 8, 2009 #3
    genius...thank you!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Differentials word problem
Loading...