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: What is the approximate diameter of the moon.

  1. Oct 26, 2006 #1
    the moon subtends an angle of 9.06 x 10^-3 radians amd os 3.84 x 10^8 meters from the earth. What is the approximate diameter of the moon.

    so i think it has something to do with formula R=S/theta but i'm not sure how to compare the moon and the earth information to find the diameter of the moon plz help!
  2. jcsd
  3. Oct 26, 2006 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    Think of a circle around the earth with radius = distance to the moon. The moon takes up only a small part of that circumference. Find the circumference of that circle. The distance the moon occupies on that circumference is the diameter of the moon. How is that distance related to the angle the moon subtends?

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

Similar Threads for approximate diameter moon Date
Approximation to square root Jan 31, 2018
Approximation for a slipped pendulum Dec 31, 2017
What is the approximate diameter of an oil molecule? Jun 4, 2010