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: Volume changes

  1. Apr 29, 2009 #1
    1. The problem statement, all variables and given/known data
    The active element of a certain laser is an ordinary glass rod 18.7 cm long and 1.33 cm in diameter. If the temperature of the rod increases by 78.5oC, calculate its increase in length. Calculate its increase in diameter. Calculate its increase in volume.

    2. Relevant equations

    change in L=Li*alfa*change in T

    3. The attempt at a solution
    Length increased by 0.0132 cm
    Diameter increased by 9.396E-4cm
    I don't know how to get the increase in volume. Could someone please help? Thanks!
  2. jcsd
  3. Apr 29, 2009 #2


    User Avatar
    Homework Helper

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