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: Question periodic motion

  1. Jun 7, 2004 #1
    what periodic motion is used as a reference for our year
    help will be greatly appreciated
  2. jcsd
  3. Jun 7, 2004 #2
    The motion of the Earth about the sun is periodic: 1 orbit = 1 year.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook