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!

Increase in length directly proportional to the origin length

  1. Jun 13, 2013 #1
    Hi all,

    When an object is heated , why is the amount of change in its length directly proportional to the original length ? I have read that the increase in length it is directly proportional to the initial length in most of the articles. But I wanted to know how this proportionality arrived at ??
  2. jcsd
  3. Jun 13, 2013 #2


    User Avatar
    Science Advisor

    If one meter stick expands by 1 mm when heated by some amount then two hot meter sticks laid end to end will longer by a total of 2 mm.

    And each half of a hot meter stick will have expanded by 1/2 mm.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook